Cher WRACo,
Ci-dessous, une proposition de réponse à ta question. Comme les Tchèques, à la fin de la 2ème GM, ont repris les "marquages" allemands, il se pourrait que ton "K" soit celui de la dernière ligne du tableau. Cuivre/laiton se dit "Küpfer" en allemand.
Je continue à chercher.
A+
Captain
Czechoslovakia:
Without doubt, the former Czechoslovakia took many aspects from the German WWII headstamp. The factory codes consist of stamped-in three digit lower case letters:
avm: Unknown Czech factory (code found on fuzes)
aym: Povazske Strojarne, Narodny Podnin, Povazska-Bystrica
bnt: Unknown Czech factory (code found on cases)
bxn: Sellier & Bellot, Vlasim
czo: Weapons factory Vseten
dtp: Vlarske strojirny, Slaviein
ena: Policka´s machine works, Policka
evr: Powder filling plant in Nyoany
fut: Adamovske strojirny, Adamov
gts: Powder filling and ammo-assembling plant ZVS, Dubnica nad Vahom
hsu: Kovohuti Rokycany
irv: Weapon factory Bojkovice, now Zeveta Bojkovice, Bojkovice
jpw: Zbrojkova Vsetin, factory in Jablunka (code found on 30x210 Br-303 belt link)
ndn: Unknown Czech factory (code found on 9mm Luger cartridge cases)
nma: Powder manufacturer Syntesia, Pardubice-Semtin
oma: nknown Czech factory (code found on 9mm Luger cartridge cases)
uxa: Zbrojovka Vlasim, Narodni Podnik, Vlasim
whx: Filling and recalibrating plant Nováky, Slovakia
zyj: Unknown Czech factory (code found on fuzes)
0: Unknown Czech factory
R or +: Recalibrated and reused cases
K: Cartridge case made from silicon-brass
Ref: http://www.geocities.com/russianammo/Headstamp.html