Probably a dumb question, but why "tgf"? What would be the point in using a "secret", WW2-style manufacturing code post-war?
Evidently they found the system usable and simply went with it. They also coded some of their postwar pistols "rid" (e.g. CZ52 pistols), some of their other weapons "she" (e.g. CZ52 rifles, CZ52/57 rifles), and used the codes "aym", "bxn" and "czo" on ammunition. In addition to bayonets and 98k's, tgf was also used on a .22 caliber trainer (Model 1).
Here's an incomplete list of Czech postwar codes stolen from GunBoards along with the GB link to a discussion on the topic. For the record, I DO NOT believe that tgf has anything to do with the title "Tschechische Gewehr Fabrik".
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 Zbrojovka Vseten
dtp Vlarske strojirny, Slaviein
ena Policka´s machine works, Policka
evr Powder filling plant in Nyoany
fut Adamovske strojirny, Adamov
grv Konstrukta Brno
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 Unknown Czech factory (code found on 9mm Luger cartridge cases)
rid - Ceska zbrojovka Strakonice
she Ceska zbrojovka Uhersky Brod
tgf Zbrojovka Brno
uxa Zbrojovka Vlasim, Narodni Podnik, Vlasim
whx Filling and recalibrating plant Nováky, Slovakia
xbk Optikotechna/Meopta
yal Meopta Prerau - Prerov factory
zyj Unknown Czech factory (code found on fuzes)
http://forums.gunboards.com/showthr...zech-arms-and-ammunition-(esp.-quot-tgf-quot-)