I see your niche hyperfocus and I raise you one hyperfocus.
In the wooden boxes for Enigma encryption machines, the position of the lock varies between different models and/or manufacturers. Sometimes, the lock is in the lid, sometimes the pin is in the lid.
Also, the stamp "Klappe schliessen!" is sometimes stamped in a serif font, sometimes it seems to be in DIN-1451. And there's sometimes a rectangle around the stamp, sometimes there isn't. Intriguing.
In the wooden boxes for Enigma encryption machines, the position of the lock varies between different models and/or manufacturers. Sometimes, the lock is in the lid, sometimes the pin is in the lid.
Also, the stamp "Klappe schliessen!" is sometimes stamped in a serif font, sometimes it seems to be in DIN-1451. And there's sometimes a rectangle around the stamp, sometimes there isn't. Intriguing.