STM RMI 40 D Worm Gearbox 40:1 Reducer 0.29Hp 412rpm IEC 63

Frame Size: IEC 63
Ratio: 40:1
Input RPM: 1650
Output RPM: 412.5
Input Shaft Diameter: 11mm
Output Shaft Diameter: 19mm
Output Shaft Orientation: Hollow Shaft
Input H.P: 0.29
Does gearbox include breather vent?: N
New Old Stock Surplus Item from Spare Parts Storage.
Looks like it might be a new take-off.