Corner store flea market finds

[amecks]

Stopped in at a little store in town today. Spent $5 - $3 for the adjustable wrench. Diamalloy 6" - I like these, they are light and strong. This one got cleaned with a little brass wire brush and went right into my bicycle tool kit. A Bonney 1122H long combination wrench 11/16" 6 point. After I took the picture I cleaned the snap ring pliers and found they are also Bonney - #B21.
How old are these Bonney tools? The wrench has date code K:O.
Thanks. Al.

[bonneyman]

First letter is month. "K"  = November
Second letter is year. "O" = either 1923, 1937, or 1951.

http://home.comcast.net/~alloy-artifacts/bonney-forge-tool.html#dates

Since the combo wrench looks like the Streamline style, AA would place it in 1951.