The photo of the toggle train isn't quite sharp enough to make out, but the rear toggle is from either an Erfurt or possibley a Simson (if the mark is an E/6). This must have been put together from several pistols, including the very rare unit marked frame.
Take your time with dis-assembly, cleaning and lubrication. Especially be careful when removing the grips. Lift the left one only slightly before sliding it away from the safety lever. Hopefully you'll find it in good mechanical and shooting condition. They are quite a bit of fun to shoot. I'm left handed, and especially like the cartridge cases ejecting over my head instead of across my face...
Marc
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 Igitur si vis pacem, para bellum -
- Therefore if you want peace, prepare for war.
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