Russian Bayo Tang Stamps

[running-man]

M08 noticed interesting bayo S/N stuff in a post on gunboards (http://forums.gunboards.com/showthread.php?673233-Russian-Letter-I-Series-Never-noticed-this-before)

I wanted to start a thread here to have a place to put the various different tang stampings people have seen.  Many bayos get overlooked as they are just bayos, but I suspect there is some good info in there if we can collect and categorize it.

Circle У on a '56 Tula, Irkutsk Light Refurb:


Circle B on a '53 Tula, Irkutsk Light Refurb:


Triangle B on a '51 Tula, 1st GRAU / Balakleya Heavy Refurb:


Triangle З (Ze) on a '51 Tula, 1st GRAU / Balakleya Heavy Refurb, also another unreadable stamp inside a circle that looks to have been ground off on bottom:

[Loose}{Cannon]

I have some on a russian letter gun bayo that went through a fire and turned black but cannot make them out. Few on my SS... cant make it out.  Few on my sneak... cant make it out.

[Power Surge]

Is there a way to tell blade bayos apart by country of origin? I've got a loose blade that came in a lot of 3 bayos I bought that has what looks like either a "C" or an incomplete circle with nothing in it.