Any info on this round and the gun(s) which used it would be greatly appreciated.
I believe it is all correct components, but it may be a mismatch between the case/projectile/fuze.
Case appears unfired with base markings including 1941 [date?] diamond split into two triangles with letters O and B; 15 [smaller 2] cm; 1 5 with small SJ between; and small [inspector mark?] that looks like a circle with several points like the bastions of a fort.
Screw in primer.
Fuze is marked SSJ/60na and crown over SA, hhj, 17/, 1944 and waffenamt inspector mark.
Projectile with single rotating band and tapered base has a few numbers the only legible ones being 81/[45?] and there is a D inside a circle on the tapered side of the base.