I assume this 2-hole shot board dummy to be a Gevelot (SFM) 12 mm French revolver. The headstamp is rather crude and has a very deformed “12MM” impression. All the other GG 12mm French revolver cartridges I have are either inside primed or Berdan primed. What type of primer system is used here (some type of battery cup)?
Most SFM board dummies I have seen have 4 or 5 holes. This one only has 2.
Any thought as to when this one was made?