I bought a bunch of cable releases recently to get the two I was interested in and two of the others are odd. One has a square thread and one is pretty large. The large one is I think a Voigtlander since it has a V in a circle with wings on the plunger. The square threaded one just says Germany on the plunger. I was curious if anyone knows what these are for? I included a regular release for size comparison.

Edit- did a quick search and the V one that is larger looks like an old Hasselblad logo.

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