New Old Stock 11 Tooth Seed Spacing Gear for Cole No. 40, 41, 42, 43, 44, 45, and 46 Planters.
Referred to in Cole Equipment planter parts catalog as a "eleven point change sprocket" and was used to adjust seed spacing distance.
Cole Manufacturing part number 355.
The gear will fit a hex shaft. The hex diameter is 1-1/4" inch point to point.
The total outside diameter is 4-5/8" inch.
Current Cole part numbers may vary from the casting numbers embossed on the actual part.