Additional measurements associated with keyway..
The hole that would align with the “nose” on the key is definitely at the top of the keyway slot.
I inserted a toothpick into the keyway. When inserted into the hole, the “Total Depth” appears to be 7/16 of an inch.
When the toothpick is in the slot, but not in the hole, the “Flag-Depth” depth appears to be 5/16 of an inch. Hence, the “hole” inside the keyway that aligns with the “nose” on the key would appear to be ⅛ of an inch seep. .
An additioan; picture of the inside of the lock (cleaned up a bit) is also attached.
Anyone have further thoughts on the correct key for this lock?
Thanks in advance.

