reichwehr buckle, question ?

[p38]

hello

do someone can tell me what are the markings "B" and "3" on the tab of this reichswehr buckle ?

thank you
regards
Emmanuel

[rick1]

The B means it went through the Berlin army depot...not sure about the 3.
Nice buckle.

[p38]

thank you

do someone have an idea about the "3" ?

regards
Emmanuel