Hello .  I for sale is a thermostat housing assembly both upper and lower portions as well as the used thermostat that are out of it.  The part numbers are #180 203 0173,   621-203-0174 for the 2 housing pieces original Mercedes Benz equipment 1966 w110.  And the thermostat s marked 79 degree 11/7.  The spring on it functions good and the seal is not in bad shape.

Thank you