"Dating" a plane
Ok guys, my latest addiction arrived in pretty decent shape. It's a Stanley #3, and is a sweet plane. Cleaning, sharpening, and tuning didn't take long at all.
I'd like to figure out how old it is. The lever cap has the kidney shape and Stanley with a red background, but no patent # on the back. The blade has Stanley stamped on it, but no date code. The only remarkable thing about the plane is the knob and tote are painted black. The paint appears to be original.
Any date clues to look for?