C96 clip had a bit of a curve in it, also was 10 rounds (shock! shock!)
These are found fairly commonly, guys above have ID'd them pretty well. One thing I will say is that the original 9mm Steyr round is a bit loose in these and might pop out. Original round had a slightly tapered case, .380" at the tim, .375" at the mouth. This is only .012" smaller than the Luger round, but it can really make a difference going into the old gun.
Best cure for the scarcity of 9mm Steyr brass seems to be .38 Super brass: turn the rim to even-out with the case diameter, bevel slightly and load 'em up.
Steyr is a BEAUTIFUL gun to shoot: accurate and fast, even if it does point strangely. Use the sights and you will be surprised.
Hang onto these; one of these days, somebody gonna run out!