

It appears to be cast of Stanley No. Measures 10" long, 4 3/8" high and 15/16 wide. Cutter 3 3/8" long with a 15/16" wide cutter edge reduced down to 5/8.
Not sure if it is a prototype or copy. Item is as found, came from elderly man in his 90's who still uses his planes to do wood projects. Please see photos for further details.