John Sell Cotman (1782 – 1842)

Get a Cotman Certificate of Authenticity for your painting (COA) for your Cotman drawing.

For all your Cotman artworks you need a Certificate of Authenticity (COA) in order to sell, to insure or to donate for a tax deduction.

Getting a Cotman Certificate of Authenticity (COA) is easy. Just send us photos and dimensions and tell us what you know about the origin or history of your Cotman painting or drawing.

If you want to sell your Cotman painting or drawing use our selling services. We offer Cotman selling help, selling advice, private treaty sales and full brokerage.

We have been authenticating Cotman and issuing certificates of authenticity since 2002. We are recognized Cotman experts and Cotman certified appraisers. We issue COAs and appraisals for all Cotman artworks.

Our Cotman paintings and drawings authentications are accepted and respected worldwide.

Each COA is backed by in-depth research and analysis authentication reports.

The Cotman certificates of authenticity we issue are based on solid, reliable and fully referenced art investigations, authentication research, analytical work and forensic studies.

We are available to examine your Cotman painting or drawing anywhere in the world.

You will generally receive your certificates of authenticity and authentication report within two weeks. Some complicated cases with difficult to research Cotman paintings or drawings take longer.

Our clients include Cotman collectors, investors, tax authorities, insurance adjusters, appraisers, valuers, auctioneers, Federal agencies and many law firms.

We perform John Sell Cotman art authentication, Cotman appraisal, certificates of authenticity (COA), analysis, research, scientific tests, full art authentications. We will help you sell your John Sell Cotman or we will sell it for you.

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The Waterfall 1803

John Sell Cotman was an artist of the Norwich school and an associate of John Crome. He was born in Norwich, England and worked mainly in watercolour, but also produced architectural etchings. He spent virtually all his life in England, apart from three trips to Normandy financed by rich patrons. He moved to London at the age of sixteen, and was based there for the rest of his life.

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Seashore with Boats 1808

His sons, Miles Edward Cotman and John Joseph Cotman, also became painters of note. The British Museum in London, England has a large collection of Cotman’s works, as do the Victoria and Albert Museum and the Norwich Castle Museum in Norwich. Cotman’s name is used as a trademark by Winsor & Newton for a range of artist’s watercolor materials.

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Greta Bridge, 1805

Still wondering about a British painting in your family collection? Contact us…it could be by John Sell Cotman.


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