Three-Piece Block - Stewart Coffin by Brian Menold

This is a classic design by Stewart that still stumps me, yet only has three pieces!

Here’s Stewart’s description:

“I dashed off the design of this 

simple puzzle in response to a request from a New York advertising agency, whose client, Citibank, wanted hundreds 

of them for use in some sort of sales promotion scheme. The base of it presumably resembles Citibank’s corporate logo. I also made some for general sales. What a surprise it was 

when friends started reporting it was one of their favorite puzzles, much more confusing than I had at first assumed. 

You never know. The designer of a puzzle may not always be the best judge of its difficulty, since he or she does not usually have the opportunity of trying to solve it.”

Shipping cost to be determined at close of auction.