Thanks, Raimey.
It may well be a Suhl frame but the finished product still whispers "Ferlach" to my ears. Lack of indicators is yet another indication in this direction.
As I see it, one possibility is that it was made for a high ranking Allied (British?) officer in occupied Ferlach, possibly circa 1947, before the formal production was restarted (circa 1948?). He could afford to skip the formal proofing - if it was operative at that early date at all.
With kind regards,
Jani