help with markings

Is someone knows what are ths markings Pi 36 II

As mentioned on other forum, there is no visible details of front secure strap, as You are from Serbia i assume this is a postwar yugo conversion with new secure strap and brass button? so the old markings should be looked under the strap, as there is not the full marking visible, teoretically a Pionier Battalion nr.36 which was raised 1937 anyway, the II is not typical for smaller units, but mostly used as II.Battalion designation to sample.You should rotate the secure strap on central rivet or move the parts to read the complete stamping. b.r.Andy

im try to find some one who know or see before this markings.... cant move strap.
anyway tnx

I assume You could move the part of strap to see the marking under, or made better pictures of all area, now in mobile period, where everyone has a good camera in mobile.b.r.Andy
http://www.lexikon-der-wehrmacht.de/Gliederungen/PionierBat/PiBat36-R.htm