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What Do Those Numbers Inside Vintage Scales Mean?

Hope this is the right place to post this question-
I've got a couple of old straights, one german and the other US, with black celluloid scales, and they both have numbers stamped on the inner side of the scales, "93380" and "8736" respectively.
Anyone know why these numbers are there?
Would the number be unique, like a registration or IMEI number unique to that razor?
 
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