Need Info on 1918 1920 Luger (Picts)

[policeluger]

Hardness test points are per Costanzo, found on 1937-1942 Mausers and not noted to be found following serial numbers, and not noted on earlier years of production. Perhaps this is a police "thing"....but I do not think it has a thing to do with hardness. On my one example note, if it were a hardness teat, why only the side plate ?.