Romanian 7.62x39

I have had an email from a person researching Warsaw Pact Arms and Ammunition. He said:

[color=#0000FF]I can reveal the secret behind those curious Romanian manufacturer codes 321, 322, 323, 324 and 325: Those are all UM Sadu. Please note that the actual code was “32” and that the last digit indicates the year of production. The end numbers 1-5 are consecutively repeated in a 5-year sequence.

Examples: 321 = 1991 or 1996, 322 = 1992 or 1997,
323 = 1993 or 1998, 324 = 1994 or 1999, 325 = 1995
or 2000.

There are more Romanian code numbers (on large calibre cases or other ammunition parts) that follow the same scheme (some repeat the numbers 0-9 instead of 1-5).
This code system was explained to me personally by a representative of UM Sadu during the French Eurosatory arms show in 2008.[/color]

He also lists “543” as a headstamp for 7.62x39. Has anyone actually seen this?

[color=#0000FF]543 KMZ Santekhpribor, Kazan, Republik of Tartastan
Was only in operation between 1942 and 1947 and produced 7.62x39 and 7.62x54R ctgs.[/color]

Philippe R. reported a 7,62x41 marked 543 45 in the old forum.

Hans–7.62x41 makes more sense than 7.62x39 for a “543” headstamp, given the time frame of 1942-1947. I have already asked him to confirm that he has actually seen it on a 7.62x39. I had not thought about it being on a 7.62x41.


One of the head stamps in question of the 7.62x41 is:

543 6. 45 6.

(the 6 is the lot number)

Thanks for confirming what I had suspected for a long time. Any explanation WHY they needed to codify the factory code? Why the change from “22” to “32-”? One look at any of these cartridges, regardless of what factory code was used clearly identifies it as Romanian…


  • It’s hard to know the real reason why the Romanians changed after 1990 the old factory code “22” (U.M. Sadu) with a basic code “32” followed by the last digit of the year of manufacture. One explanation should be the “change” which took place in Romania after the fall of the miserable communist regime in December 1989. Another Romanian ammo plants used the same method; the excellent book named “Soviet Cannon” (author: Christian Koll) explains very well those twisted Romanian ammo factory codes. Liviu 11/22/09