Hi mate,
For Germany i have some detail book but unfortunately i don't have a scan nor a camera.
But for other country i just spend hours searching on military site and forum and most of the time i found what i am looking for.
As an example i just found recently some merchant marine visor bullion for UK and US i was surprised how similar they are.
best of luck and surely other members will be able to lay you a hand on this.
Best regards Hans
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