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D.R.G.M. whistle mark

Curious about the initials D.R.G.M. ??? Ya see 'em on German whistles sometimes.

Registrations are different than patents. Some interesting reading about it at the following link…


I like the part about poor mans patent !!!! Just received a cheaply constructed whistle from Germany with that stamp and thought you might want to take note of it ( saved here anyway ) —- you know, for your records…. helps in dating them too.

Hmph…cheap whistle construction….at least it has a stophole 🙂



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