Zoltan:
It is the same tubeset which passed thru the Budapest proof facility in 1967. Then again in 1978 & 1987. Also it appears that the weight was changed at some point or it is a very poor stamping effort.
Proof on an unfinished tube is just that. Separately tubes are taken to the proof facility with a hole less than the final diameter of the tube. I can't remember the exact number, but only a small amount can be polished away from the final diameter without being out of proof. After the 1st proof rules were enacted, wagon loads of single tubes were take to the proof facilities possibly in an attempt to prevent the loss of a tube in a tubeset if one of the tubes failed.
True, nem golyonak means not for bullet but the reason is that there is some degree of constriction. Common stamps are:
Not for Ball
Non Pour Balle
Nem Golyonak
Jen Pro Broky
Nicht Für Kugel
The reason they are applied is to note constriction and as you say do not pair well with some slugs.
Kind Regards,
Raimey
rse
