https://www.mrosupply.com/speed-reducers/96711749_30604261_boston-gear/
Boston Gear 30604261 SF832BR-50KT-B5-M1 Helical-Worm Speed Reducer 50:1 Ratio 3.2" Center Distance...
Boston Gear 30604261 SF832BR-50KT-B5-M1 700 Series helical-worm speed reducer, 50:1 ratio, 3.2" center distance, 56C input flange, cast iron housing.