Marching boots

[kass]

Hi.
Could these be another variant of WWII period Army issue boots? I have seen 2 types of factory made boots for RKKA.
They have pig lining and brass nails on the soles. No markings that I can find.

Regards
K.

[kass]

Cleaned them and found markings inside the shaft. They were hard to see at first cause they were punched in and pig liner have bristle holes as well.
That's how they are:

[kass]

Cleaned them a bit and took some better shots. Turned out there's an ink stamp as well and the last number in the right bottom corner is 30 and above that looks like 24 or 34. They do look like pre WWII RKKA to me. Could they be?
Regards
K.