In post #7, the Abg.Lstg. number is "120", but if you look closely, it appears that there is a numeral "2" ghost beneath the numeral "1" - suggesting the original Abg.Lstg. being "220" perhaps?
If you mean the Abg.Lstg number seen in the pic below ... IMHO there is no trace of the "2" ghost digit there. It is a light trick I would sau. The shape of the surface around the "1" was caused by the stamp.