In article ,
=?ISO-8859-1?Q?Nick_M=FCller?= says...

plh wrote:


The thing with the circle drawn around it was being used in Germany to
straighten Micrometers as part of the repair process.

Micrometers? Are you nuts? This is more for the brutal job. But also,
there might be smaller variants.

Believe it or not, yes. It's used to straighten the frame. You have to be pretty
brutal to bend a micrometer frame, but it happens. When it is close enough you
lap in the carbide contacts.


We call it "Franzose" (Frenchman), the French call it "Clee Anglais"
(English wrench) and the English call it "French key".

Does that help?

Nothing turned up on Google, but thanks, it's a start.
-plh


--
I keep hitting "Esc" -- but I'm still here!