[Michael R.]

Good to hear from you Dušan. Is that British welded hull construction Petr has there?
There are a number of indicators other than the obvious welded hull and lack of rivets with supporting angle iron brackets.

I am noticing the steering gearbox, driver seat upper bracket, solid (i.e.: non-cast) Stacey attachment, cable access opening through divisional wall near driver right elbow.
Can you post some engine detail images? You may find a serial number on the block.

Once it is restored it will make a nice compliment to the mortar carrier and outstanding Windsor Carrier your group has access to at the Military Technical Museum Lešany.