Now when I set out to impression a small lock, instead of pulling keys out of storage and trying out the likely looking ones, I have the more common blanks on a chain and I use to discover which blank fits then I go straight to one of those blanks. The chain came from the ceiling fan section in a home center. Cut it in half and the other half has the more common large keys on it.
The lock below that came from a Kennedy Machinist's chest uses an AP3. This gets the profile right, but not necessarily the length if it is a pin tumbler lock that used 5 or 6 pins.
Thinking about keeping this chain for the more common blanks, then making a second one with the less-common blanks I have.
