Cloth DKiG Luftwaffe Backing - Mark on Reverse

[PAB_Collector]

Gentlemen,

I was never into cloth badges, but just recently picked up this DKiG with Luft backing.

My question is, what is the mark on the reverse backing? I believe it is a 1 or 2?

[IVAN]

Hi,

difficult to say what is this sign but I don't think it is a mark.