This may be a stretch but Trash Nothing seems to find the right match, so here goes:
This is a Gibson Slumbermaster AC. The plate says it’s 5,900 btu’s.The body of it measures 18” wide, 13” high. It is old, the mfr date says 1982. I think we used it until 1988. It runs but I don’t know for sure if it cools. I’ve got it in a cold basement room so i’m unsure if what I felt was ambient air or chilled air. Also, the control knobs are missing - but it responds well to pliers. Seems like this might be good for a work room or a cabin bedroom.