Below are a couple of pix of my old Black & Decker hand drill that
had been my dads. It may be 30s, I'm not sure.
Included is a pix of the name plate if that'll help.
i cant help ya with an exact date - but there seems to be a couple on ebay for only around $20.. i was pretty surprised - though it would be worth more..
there is a similar one that states its around 1920's.. very cool either way..