RogerS
Established Member
This one looks quite old. The corresponding fitting is a small plate with a tiny ball on it that goes into the hole you can see on the edge. I have no idea what this type of lock is called and so Googling is a bit difficult.
To give you some idea of scale, it is about 6/7 mm deep. The piece it sits in is 18mm thick.
I suspect that I may be unlucky.