[Михалыч]

Сообщение от SergeiSK

I know that's such stamps.
They stand on the works Udaltsova 1940-50 GG

Сообщение от mihailovoh

SergeiSK,
   
Thanks. Udaltsova I also work with the same punch and podpisyu.imenno on this and confused.
PA signature Drevins not yet met.

Here about printing:

http://www.vesti.ru/doc.html?id=723514&cid=460

in the video it shows.