This a working, 29-year old, used WaterBoss water softener reduction-gear drive motor.  I think its 24 volts.  When I looked around on-line, the part numbers #90217 and # 19143 come up, but I don't know if those are the correct numbers; because of its age, it's too old to look up directly. Its cover is a little rusty, but it works fine and was pulled after the softener sprung a leak elsewhere.  It is sold as is.