The Pop art icon once told Gene Swenson of Art News: "The reason I'm painting this way is that I want to be a machine, and I feel that whatever I do and do machine-like is what I want to do."

Warhol's screen-prints depicts icons in a tile form, ranging from Elvis to those famous red Campbells soup cans. He began his screen printing work in 1962 by screen-printing the dollar bill.

At Sotheby's Contemporary Art auction in London, in July of this year, Warhol's hand-painted dollar bill, from 1962 exceeded its pre-sale estimate of $20-28 million as it sold for $32 million, whilst gallerist Larry Gagosian purchased the 1981 silkscreen featuring 20 dollar signs for $10.6 million. Read about the Sotheby's sale here.

Image via Christie's Image via Christie's

A move away from these silk-screen prints, what could be one of Warhol's Watercolour Paint Kit with Brushes was submitted through Barnebys appraisal service. In 2006, one from the series was sold at Christie's for $3316, including buyers premium.

Submitted by Barnebys user via appraisal service Submitted by Barnebys user via appraisal service

Submitted by Barnebys user via appraisal service Submitted by Barnebys user via appraisal service

Submitted by Barnebys user via appraisal service Submitted by Barnebys user via appraisal service

Mallams 20th century art and design expert Phillip Smith explained:

''This is on offset lithograph in colour and should be on wove paper and signed in brown felt-tip pen.''

''This piece, is numbered 365 out of an endition of 500, there were also 75 artist's proofs. The works were published and print by The New York Association for the Blind/Kordett Colour Graphics and Rupert Jasen Smith of New York.''

If authentic, Philip estimates that the piece could reach £1200-1800 at auction.

Cowan's specialists stated: ''If it is indeed actually signed in marker by Warhol, we can give a good evaluation of the item and it would be a fairly expensive piece. If it is not signed by Warhol, the value would be no more than $100.''

It's all in the signature! See what your art is worth through Barnebys appraisal service.

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