toggle lock?

[sheepherder]

Originally Posted by DonVoigt

You can buy a 1900 with intact parts for the $1995 you mentioned.

Exactly.

I don't think a "yank" would break it, more likely just metal fatigue; it is a small,thin part with a groove cut in it...

Not quite, but as yours is broken off, you're excused.

It's much more than just a groove. It's actually a machined part with a 90º 'hook' on the top. The 'hook' has a chamfer on the top and the bottom section is squared and fits in a corresponding square slot in the frame rail. Then it is silver-soldered in place.

It has no other function than to keep the toggle from flying open under recoil. It would appear that Georg Luger/DWM conducted enough tests to determine that it was superfluous and was eventually left off.

"Yanking' on the closed toggle is about the only way I can see to break it off. There is no other strain on it.

The chamfers on the bottom of the toggle piece and the top of the frame piece slide over each other when the toggle closes.

Some pics to illustrate below (taken of my 1900AE). TBLAP has blueprints for the M1900, there may be one for the frame piece. Finding one loose is like finding hen's teeth, as someone remarked lately...

Edit: TBLAP does indeed have the blueprints for all the toggle lock parts as well as the cut in the frame rail.