DENVER, Penn. – The third and final auction of the Bobby Knudsen Jr. petroliana collection saves the best for last at Morphy Auctions. Taking place Friday, September 29 through Sunday, October 1, the catalog is now open for bidding at LiveAuctioneers (Day 1, Day 2, Day 3).

“Many great signs were intentionally set aside for Part III of the Knudsen series,” said John Mihovetz, Morphy Auctions’ automobilia and petroliana department head. “Bobby wanted it that way, and so did we. It will be a worthy farewell to a legendary collection.” Days 2 and 3 include select consignments of rare and fresh-to-the-market signs, globes, cans, and gas pumps from other high-end collections, with estimates ranging from $100-$100,000.

A valuable bonus applies to all pieces from the Knudsen Collection Part III. Each and every item has been graded, certified and stickered by AGS, the recently launched expert grading service that specializes in antique advertising.

Day 1’s top lot is a 1930s-era Beacon Ethyl Gasoline single-sided porcelain sign. Measuring 48 by 30in and AGS-certified 89 on a scale of 1-100, it carries an estimate of $50,000-$100,000.

Also leading top estimates is a circa-1930s Sinclair Aircraft Gasoline double-sided porcelain sign. Measuring 48 inches in diameter, this sign is AGS-certified 88/87 per side on a scale of 1-100. It is estimated at $40,000-$80,000.

The 1920s was the period when auto racing became a national spectator sport. This 1920s-era Mobiloil double-sided porcelain sign with a die-cut graphic of a race car and driver is 16in and AGS-certified 83/80 per side on a scale of 1-100. Its estimate is $20,000-$40,000.