any guesses

i gues a cletrac

Might possibly be a Clark? Clark built some mini-dozers for WW2 that were meant to be air dropped from a cargo plane or flown in (crash landed) with a glider and then used to clear a landing strip for aircraft, build bunkers, etc. I have seen a few of the "Clark Airborne" dozers at military vehicle shows and this one looks very similar.

Very close on the airbourn who was the airbounns FATHER Only 2 have been found that I know of

Gallery of father son Clark dozers.....the Trail Dozer and the airborne version.

http://www.syltech.net/gallery1.htm

USTrac, i think, would know forsure with front photo.

It is a united States Forest Service Trail Tractor Father of the Clark Airbourn and Grandfather of the Trail Beetle Found it In Idaho and brought it to Minnesota for a complete restoration If anyone is interested I can send you Pic It has a Waukesha fc engine Dual wet clutch a T-9 transmission and a 1 ton ford rearend cut down to end of axle to end of axle is only 38" outside to out side of tracks is 46" Really a neat little rig even has a winch/

Seeing that machine reminds me of a local collector I know that's way into those small machines like that. His name in Marvin Hedberg from Rush City, MN, by chance do you know of him? He could probably tell you everything there is to know about a little machine like that, he owns several of the Beetle/Mighty Cat crawlers, even a little US Forestry Service trail grader that's built on the same compact powerplant as the Beetle crawlers, plus literature on all of them. If I remember correctly, he found that small grader out west in that area, too.