they probably had to use three vents due to the quality of the material they were using at the time. and even that didn't work very well, as the two plates are poorly joined. bet this is an early 20s example done during that period when quality materials were not readily available.
heya--- like i said in the header: worn. never said it was especial...just a worn out 'ol badgy-badge. not a fancy one--i have a penchant for used items and variants. as you well know. anybody else have a three-vent badge? that's the primary reason i posted this thingy in the first place, btw.
you can see that the front and back pieces are starting to separate in areas. as i mentioned before, the nonmagnetic base metal is not marked for silver content. the finishing reminds me of a 'mattweis' type encountered on wound badges.
sorry for the late response, guys. just got home and will do my best to provide better pics tomorrow (it's dark o'clock here right now). yes rick, you are correct- this is not a silver badge. the "frosting" finish has worn away from the salient spots, leaving the base metal. cheers, gents!
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