These show up on Ebay every now and then, they were used by the Air Force as well, there were several models, some were set for film processing, others printing, as I recall others had room for film processing as well as enlarger. The one I used at the tail end of the Vietnam conflict, even with AC was hot, the metal side could get very warm as well. Ours had a water chiller, the enlarger (Omega D 5) was bolted to the work bench and had a built in easel.