SVT-40 unknow marks

[lorne19]

I've been trying to identify witch arsenal the components on my SVT trigger group are from. I've been able to identify 2 parts as Issy and one as Tula but the rest are marked with a strange T mark. Dose anybody have any idea what these mean?

The mark is also on the trigger and several other parts you can't see in the photos.

 

[RobSmith]

Inspection stamps ?

 

[CanadianAR]

I think they are test proofs

 

[skirsons]

I believe it is the common inspection proofs found on all Russian military contract items. Look at an SKS sling if you get a chance. The most common inspection marks are always "O T K" sometimes only one of the letters, sometimes all three. Sometimes all three stamped in different places.

 

[lorne19]

So the general consensus seems to be that the T is a proof mark then. I wounder why it is only stamped on pieces that don't have an arsenal mark on them?