A 1970's  "Drying Tumbler".   I remember older turquoise machines with the much smaller glass window, they also had the "child killer"  mechanical  door  latch like older refrigerators.  Later the same door with the small window but a square handle and magnetic latch.  From what I remember this machine with the full glass window is from the time as posted above.  The SQ, TL, ST washers of the era came in turquoise, orange, and a 1970's apple green, not avocado.  IIRC these strange colors were available only in the coin op, line up.  Art