Aim true !
Pic includes a 9mm casing. The case mouth inside is larger that a 357 but smaller than a 40 bullet. No caliber markings.
the ones I’m using are .357 for 38 special/357 mag and .356 for 380/9mm. .356 will push right down inside a 38 special case with your finger after resizing the case, without even flaring it.The actual measurements are different, but what we call 7.62 is 30 cal or .308. What we call 9mm is (I will have to go measure a bullet which I'm too lazy to do right now) roughly the same as 38 Spl and 357 Mag bullets which could be 356-358.
So, perhaps with a little clearer picture of the headstamp, .... but I think BillM wins the chicken dinner on this one.