Pair of ACME's, coyote approved...

[somd_mustangs]

Virtually nothing out there on these, one thread here:
viewtopic.php?p=1116

These are a lot bigger and heavier than one would expect. Made of steel components welded together and as noted very fragile grips. One has a straight(ish) trigger guard, the other angled. My speculation is that the angled version is later and they didn't care about how it was cut to length, just welded it as-is. The angled one has cruder welds throughout and has S/N 6 (or 9?), the straight TG is unnumbered. Both pistols have what appears to be an aluminum deposit finish. It might be paint, it might not. Not "raw" anyway.

[somd_mustangs]

S/N 6 details.
With the angled trigger guard, I have to put my middle finger inside the guard and ring/index fingers outside which makes it a bit awkward to pull the trigger through.

[somd_mustangs]

Details of the no serial number, "not quite straight trigger guard" pistol.
The cutouts on each side of the barrel are to facilitate brute-force, manual extraction of the fired shell.