Nice vintage hammer. The round face is 1-3/4", the square is 1-9/16". The number 4551 is stamped in red ink on the butt end of the handle. There is a hang hole.
Vintage Craftsman Professional Body Tools Bumping Hammer Model 4551 USA READ
Vintage Craftsman Professional Auto Body Hammer Flat 1 1/2” Wide Face #4556
Vintage Craftsman Professional Body Tools Blunt Pick Hammer Model 4553 USA ????????
Lot Of 3 Vintage Craftsman Professional Body Tools Car Body Hammers
Vintage Craftsman Professional Auto Body Pick & Bumping Hammer
Vintage Craftsman Professional Black Handle Phillips Screwdriver 47437 WF USA
