Help identifying tuner footprint

[MIB]

Can someone here tell me what machine heads have a set screw location like this:
:think:



If so, thanks much.

[MIB]

Correction: the little holes don't have a thread inside, so weren't for screws but for pegs (or whatever the right word is) on the back of the tuners. Still would would like to know what used to be here. Thanks.

[Trem]

Sperzels maybe..?

[Nightbat]

would be my guess as well, there must be some blueprints with dimensions for them on the net

[MIB]

Good call gents. Yup, after looking Sperzels up online, that's what it looks like to me too. Thanks!