A rare double-sided Harbor Petroleum Products sign is to headline a sale at Morphy Auctions in Peotone, Illinois on February 28.

The lot, which is graded 9+ for condition, is valued at $40,000-60,000 and is among the most desirable pieces of petroliana on the market.

The Harbor Petroleum Products sign is among the most desirable of its kind

Made from porcelain, it dates to the 1950s and displays the company logo below a seaplane.

It features superb colour and gloss, and is marred only slightly by some chipping and wear to the edges.

In 2008, a near flawless example sold for $57,500 at Matthews Auctions in Illinois, which has recently been acquired by Morphy Auctions - with this auction the first to take place following the merger.

Conversely, in March 2013, a Harbor Petroleum Products sign of a lesser grade (8.5) realised $40,700 at Matthews Auctions.

A Wyeth Tyres porcelain sign is valued at $20,000-30,000.

It features a boy, dressed as an early motorist, sitting in a stack of tyres and is notable for its strong gloss and colour.

It features only marginal imperfections, resulting in a grade of 9.5.

A Bruinoil Bruin Gasoline tin sign carries an estimate of $15,000-20,000.

Featuring the slogan "The Bear of Them All", the sign depicts a vicious looking bear and displays good colour. It has been graded 9+ and is in good condition except for three small marks on the reverse.

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