New old stock Grove Gear Flexaline Gear Reducer Model TMQ215-2  20:1 Ratio  this is from a now closed factory that kept spare parts on the shelf in put motor 56 frame out put shaft dia. 3/4" 

Ratio 20:1
Model No.  TMQ215-2

serial No. 8000099A100
 

[Please Look at all the pictures they are part of the description]