New Old Stock 10 Tooth Gear for Cole Universal No. 20 Guano (Fertilizer) Distributor.
Referred to in Cole parts catalog as "front sprocket for No. 20 Distributor" and was used to control rate of distribution.
The gear will fit a square shaft. The square hole is 5/8 inch on one side. 3/4 inch on the other side.
The outside diameter of the gear is 4 1/2 inch.
Cole Manufacturing part number D93.
Current Cole part numbers may vary from the casting numbers embossed on the actual part.