The Bonhams auction house is currently holding an auction for the following rare baseball card:

A BABE RUTH M101-4 1916 ROOKIE CARD #151 PSA EX 5, WITH GIMBELS INK STAMP ON THE VERSO [link]

Bonhams gave it an estimated value of US$250,000 - US$500,000. This market resolves YES if the final sale price listed on the Bonhams website is >$500,000. 

Encapsulated by PSA and graded 5 (83747279).

In Chicago, baseball card publisher Felix Mendelsohn produced what we now call the M101-4 set, a collection of 200 baseball cards featuring the top players of the day, with the cards featuring black and white photography instead of the color lithography formerly in use.

In April of 1916 Gimbels Department Store launched a promotional campaign advertising a free giveaway of 20 baseball cards to kids who came in person to the Boy's Clothing Section (

Babe Ruth still holds the Major League record for slugging percentage, 