The Pop art icon 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 are almost like tiles of icons ranging from Elizabeth Taylor 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 July of this year, Andy Warhol's hand-painted dollar bill, from 1962 exceeded its pre-sale estimate of £13-18 million as it sold for £20.9 million, whilst gallerist Larry Gagosian picked up the 1981 silkscreen featuring 20 dollar signs for £6.9 million. Read more about the Sotheby's sale here.

A move away from these silk-screen prints, what could be one of Warhol's Watercolour Paint Kit with Brushes was submitted through Barnebys valuation service. In 2006, one from the series was sold at Christie's for £2,153, including buyers premium.

Andy_Warhol Submitted by Barnebys user via appraisal service

Andy_Warhol_2 Submitted by Barnebys user via appraisal service

Andy_Warhol_3 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.

Also on the condition that this is in fact a true Warhol piece from the Watercolour Paint Kit with Brushes series Chorley's director Thomas Jenner-Fust gives the piece an £800-1200 estimate.

From Warhol to Watteau, see what your art is worth through Barnebys valuation service here.