Thanks Eswube, I apreciate your comment!
I'm afraid that the series of Praga artillery tractors is lacking. So, I would like to post the heavy one: T9.
Credits: Thanks to Pombo, I almost copied the top of the cab, and the doors from his Praga AV truck, and also the general form of the canvas work. And, last but not least, the grayish green of the czech army (a shade very unfamiliar to my no so much trained eye).
PS: Now, I hope it is in png, not in jpg