All Nr.330's (and HG85 and the L109) were produced in Altdorf Switzerland.
Until 2005 the grenade body was produced in Altdorf.
The filling, the final assembly and the packing was also done in Altdorf.
The fuze was produced in Thun as a licence from Diehl.
The 2005 flood destroyed the body-line. Now the bodies are produced in Slovenia.
Surface treatment, filling, the final assembly and the packing are still done in Altdorf.
The fuzes are now from Diehl.
The bodies (beside marking and colour) and the filling are the same for all grenades.
The fuze is basically the same. The obvious difference to the standard DM 82 is the
spoon type lever. (With the standard lever it is possible to hook into the ring of the safety pin of another grenade and tear it out.)
Safety clips are on the L109 and Nr330 C1 and C2 only, not on the Nr330 or Swiss HG85.
Photos below © Werner Schumann.