Lamson (NOT Lampson) Mobilift Forklift Help Needed

[74clueless74]

Anyone out there ever heard of, or know anything about these? Per tag on unit built by Lamson Mobilift Corporation, Portland, OR (Not to be confused with Lampson from Canada). I live in Portland but no one seems to know anything about these; the only listing I find in my scattered parts catalogs is in an oil filter catalog. It's a 3 wheel rig with some kind of air cooled 3cyl engine. Any help/suggestions/sympathy appreciated. Many thxx!!