Feldpost Number Help

[LetsGo82nd]

Could someone point me in the right direction for finding information on what appears to be a feldpost number penciled onto a helmet skirt? The number is 104548/48. If this number is too long to be a Feldpost number does anyone have any other ideas about what it could be? Thanks very much for the help. -Jeremy

[hucks216]

I don't know what it refers to but it is too long to be a FpNr.