Herb and Ron,
Over the past several years, I have undertaken an extensive collection and study of Navy property markings. Database contains upwards of 600 entries. There are zero entries with a period or comma between digits. As was stated, such markings were an Army convention, NOT Navy. Simply stated, WK 7724 translates to weapon 7724 issued by Werft Kiel, nothing more or less.
The whole field of property numbering is full of contradictions, duplications and seemingly impossible occurrances. I wrote a post about this subject here some years ago.
Tom A.
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