Network of professional Restorers

Restoring Antiques

A number of professional experts are in my network of Restorers. Every expert has his own special qualifications in restoring the past: paintings, peper, furniture, porcelain. These relations are of course very dear to me. Most of our fathers already worked together in their generation.

Fathers and Sons

The fathers learned their professional skill to their sons an daughters. Like my father taught me the skills I need to qualify and valuate art and antiques.


Restored or not restored, that’s the question

For me, to valuate antique objects requires awareness of restorations. Restorations have consequences for the value of an object. Special equipment for appraisals help me to confirm restorations as well as the age and quality of the performed restorations.

Furniture restorations
Furniture restorations

Make inquiries on the website of Federation TMV

Certified Valuer

The Federation TMV is the branche organisation that serves certified professional valuers, brokers and auctioneers concerning movable properties like Art and Antiques.

TMV launched a new website which is interesting if you are looking for a professional expertise. My membership started in 1981 and since than I have performed many valuations  in The Netherlands as well as abroad.
TMV also controls certifications, so you can rely on finding a certified professional expert. Every other year each member takes an exam to renew certification.

Federation TMV has been founded in 1951. Nowadays, 300 members have been registered.



Website TMV

Frick Collection Mauritshuis : Personal Highlights

Above:’Lady on her Daybed’ by François Boucher 

When visiting the Frick Collection last Wednesday, the two paintings that impressed me most are the 18th Century painting ‘Lady on her Daybed’ by François Boucher and ‘Portrait of a man’ by Hans Memling, 15th Century.

François Boucher (1703-1770)

More than any other artist, François Boucher (1703–1770) is associated with the formulation of the mature Rococo style and its dissemination throughout Europe. Among the most prolific of his generation, he worked in virtually every medium and every genre, creating a personal idiom that found wide reproduction in print form. He was highly adept at marketing his work, providing designs for all manner of decorative arts, from porcelain to tapestry. Boucher’s insistence on a painterly surface and adoption of a high-toned palette favoring blues and pinks was well suited to Rococo interiors, but was the target of critical derision late in his career when the style fell from favor.

And indeed, few could deny the appeal of works like this pretty portrait most likely of Boucher’s wife, Marie-Jeanne Buseau (1716–after 1786). Madame Boucher frequently appeared in her husband’s paintings as the model for a goddess or a queen but rarely as herself. When this was painted, she was 27 years old, a mother of three and had been married for ten years.

Pertly propped up on a chaise-longue she looks as if she might have just woken from a mid-afternoon nap. Charmingly déshabillé, her voluminous dress is bunched up around her revealing a shapely ankle and stylish high-heeled slippers. Pink bows set off her pale skin and rosy cheeks, one of which she leans coquettishly into a soft hand. It is a candid image of a much-loved wife and as well as a compendium of the Rococo style: glossy surfaces, a high-toned palette favouring blues and pinks, a playful grace and lightness and a sentimental, vaguely erotic tone.

Source: The Metropolitan Museum of Art  |  Source: Worlds Best Paintings



Portrit of a Man | Hans Memling

Hans Memling (ca 1435-1494)

Although his date of birth is not recorded, Jan van Mimnelinghe (Hans Memling) was born sometime between 1435 and 1440 in the German town of Seligenstadt, near Mainz. His early training was carried out probably in Cologne, and it is generally agreed that, having arrived in the Low Countries in the late 1450s, Memling spent a prolonged period in the Brussels workshop of Rogier van der Weyden (1399-1464). Following van der Weyden’s death, he made the move north to Bruges, a thriving commercial center that was also a hub of international banking. He was granted citizenship of the city in 1465, and by the 1470s he was Bruges’s preeminent artist.

Memling was engaged by a variety of local and foreign patrons primarily as a painter of devotional works, in which portraiture often played an essential role (in altar wings or as part of a diptych or triptych). More or less similar in scale, format, and presentation, his portraits might also celebrate forthcoming nuptials, commemorate a long-standing union, or—as in the case of one documented work—serve as an independent epitaph, to be placed near the sitter’s tomb. Many of the independent portraits that Memling painted seem to have been commissioned to commemorate a foreigner’s sojourn in Bruges. Such half-lengths, with waterways and swans dotting the lush countryside in the background, were particularly popular with the Italian bankers and merchants who did business in this international trading city.

Source: Frick Collection


Antique Maps : Zutphen

Hierboven afgebeeld: Zvtphania | Originele antieke kopergravure | Publicatie Joan Blaeu | 1664 | Nederland, Amsterdam | € 1.950.

Aan de Bakkerstraat in Arnhem is sinds vorig najaar Boekhandel HET Colofon gevestigd. Een succesvol initiatief op een prachtige locatie in het centrum van Arnhem.

Aldaar een expositie van een deel van onze collectie met onder meer 3 originele kopergravures van Zutphen.

Exhibition at Bookstore HET Colofon, Bakkerstraat, Arnhem, showing 3 original copper engravings of the City of Zutphen.


Nieuwe Kaart van ‘t Kwartier van Zutphen | Publicatie Isaak Tirion | 1741 | €650



Comitatus Zutphania | Publicatie Johannes Jansonius | ca 1640 | €1.500



House of Orange : Private Collection

Antique Delft Charger | House of Orange | diameter 30,5 cm | ca 1770

A polychrome decorated Delft Charger with inscription in favour of the House of Orange.

In the centre a medaillon with the portraits of The Dutch Prince William V (1748-1806), also called the Prince of Orange, and his wife, Wilhelmina, Princes of Pruissen. The Charger is decorated with orange apples.

Inscription: FSW:PWO5

FSW indicates the full name name of the Princes: Frederika Sophie Wilhelmina.

PWO5 indicates the name of the Prince: Prince William Orange 5 (V).

View more of this collection on my website.


The Charger belongs to my Grandfather’s private collection.

Condition Report

Usually 18th Century Chargers need some restoration in case the owner prefers a perfect plate.After restoration chips will be invisible. For me, I never restored this plate as I appreciate it’s actual condition. The Charger has no crack’s at all, only several very small chips around the edge and 2 chips on the backside, which are 0,5 cm each.

Price of the Charger is € 1.500. Restoration can be done on request and will be € 250.










Wall covering : Frick Collection

Above: Interior Frick Museum New York

One of the eye-catching items at the Frick Museum Collection is the set of Wall Covering Paintings as presented on the photo above.

Although wall covering paintings were very popular in the 18th century, nowadays the original pieces are very rare to find.

Set of 10

Similar set of Wall Covering Paintings | ca 1800


This set of 10 pieces in our collection has been attributed to Gillis Smak Gregoor. More paintings of this artist are in the Museum of Dordrecht and have been part of the interior of the former Castle Develstein in The Netherlands.

The set is in very good condition. The wooden panels have a small wooden frame en can be fit in easily as separate wall covering paintings.

It has been in a Castle in Belgium for decades, before I was able to acquire the paintings.

Dia03 Dia04 Dia05 Dia06 Dia07

By the RKD Expert, Curator of Old Master Paintings and Works at RKD The Hague:

“After studying and research of the paintings, the name of the artist Gillis Smak Gregoor (1770-1843) came up. The paintings are of the period around 1800.

The artist is is from Dordrecht, a town near The Haque. He was inspired by the 17th century cattle painters, the most famous artists Paulus Potter and Albert Cuyp.”

Until May 10 you can visit the Museum Mauritshuis, The Hague to enjoy the Exhibition:

The Frick Collection – Art Treasures from New York

Kunst schenken: Waarde bepalen

Above: Part of my  personal Silver Collection


Taxatie | Photo by Linelle Deunk


Onlangs heb ik een kunstverzameling getaxeerd, die in zijn geheel zal worden geschonken aan een Museum. Als taxateur bepaal ik de waarde van de collectie op basis van schenking. Zowel ten behoeve van de Eigenaar, het Museum als voor de Belastingdienst is de rapportage van belang.

Het betreft een prachtige verzameling Oude Meesters die op termijn publiekelijk kan worden bewonderd. De Eigenaar heeft deze collectie in de afgelopen decennia met zeer veel zorg samengesteld.

Op onze website kunt u informatie vinden over de taxaties die ik uitvoer. Schenking is een reden voor een taxatie, maar ook de verzekering vereist een actuele waardebepaling van uw kostbaarheden. De meeste verzekerings maatschappijen stellen als voorwaarde dat uw kostbaarheden elke 3 jaar getaxeerd worden.

Daarnaast ben ik ook regelmatig te gast bij families die een taxatie voor de verdeling nodig hebben. Bij een dergelijke taxatie wordt de waarde bepaalt op basis van successie.

Website Peter van Os: Taxaties


Another Curiosity Cabinet at our Gallery


Springtime: TEFAF time

Springtime : TEFAF time


Roses | Foto credit Bodine Koopmans

Every year, spring season, the City of Maastricht shows international artworks on TEFAF : The European Fine Art Fair. This year’s focus will be on Contemporary Art, the section that has grown in the past years of TEFAF.

The collection of antiques Works of Art and Old Master Paintings is of course a very important part of this fair. For me the TEFAF has been a platform for many years. Nowadays I visit TEFAF to meet international colleagues I know for a long time already and to enjoy the collections. As my focus is also on Contemporary Art, fairs like TEFAF and Art Basel are interesting locations to visit.

Antiques as well as Contemporary ART

More and more, my relations are combining Antique Art and Contemporary Art. Provenance, market value, proofs of authenticity are important issues.

Being a dealer as well as valuer/appraiser, a location like TEFAF  is a must-see visit every springtime!

Website TEFAF



Schermafbeelding 2015-03-13 om 10.36.20

Porcelain : Historical event in Miniature

( 1789 – France – 1863)

A miniature painting presenting a scene with French soldiers of the Army of General Moncey.
The details are very precise and worked out carefully.

Emile Jean-Horace Vernet has made this miniature painting in the period of Napoleon III, ca 1840.
Measurements of the miniature are 7,5 x 10,5 cm.
The artwork is of a vey high quality.


Chinese New Year : Year of the Goat

Above: Map of China | Published in Amsterdam 1655-1662 by Blaeu

Copper engraving | Originally hand-coloured |  46 x 60 cm


As many know, our Gallery has a special relationship with China. We are dealing Art in China and Taiwan since 1988. Our relations are very dear to us as friendship has grown through the years.

In our collection we offer these original 17th Century Maps of China, all 4 of them in perfect condition.

The illustrations on the Maps are worked out very detailed.

Feel free to contact us for more information.

Map of Nanking


Map of Quantung


Map of Checking and Kiangsi