Wiley Horne
Phil,

A little follow-up.....Stanley Bedrock 605-1/2 was made from 1898-1935, so they’re all prewar (the big one). All of them had the 2-1/4” iron, which some measure to be a skosh less than 2-1/4.

You’ve likely already checked, but here is Bob Kaune’s Bedrock type study, in case you want to pin down the manufacturing date:

https://www.antique-used-tools.com/brtypes.htm

BTW, waterjet cutting does not alter the temper in any way.

Wiley