Hello Clectrac fans!

I had someone write me here at the Center for History from British Columbia asking about a Cletrac he has just purchased.  I have posted two pictures he gave enclosed in his letter.

The gentleman that wrote me believes at the core of this tractor (without all the additional equipment) is a Cletrac OC3.  He's not been able to find any manufacturing tags or serial numbers.  However, he did say it had a 4-cylinder, 40 H.P., diesel engine of Japanese manufacture.

Can anyone identify the actual model of this Cletrac (if it is one)...and an approx. year?  Parts still available?

Thanks everyone.
Travis Childs