Thanks for the photo of #22K Graham, Also on the K with Cub Jr oil sump. I had a K with the Cub JR oil sump in 2010 but I got the bright idea to sell it so now it lives in Wisconsin. Block number was 14410. So that would make the serial number 14881 and out of the range for the parts list unless they didn't have the 471 deal yet? I have tried buying it back but no such luck. Eventually I'll get it.
On the parts books again here is the latest summary of our finds.
#11 Parts Price List with Operating Instructions for the Cub
#15 Parts Price List with Operating Instructions for the Cub (Sept 18)
#20 Parts Price List with Operating Instructions for the Cub Junior
#21 Parts Price List for the Cub Junior ; supersedes #20 (May 1 1918)
#21-A Parts Price List Supplement for the K
#22 Parts Price List for the K (Jan. 1 1920)
#23 Parts Price List for the Model J and K-3
#24 Repair Parts List for the K and OK
#24A Repair Parts Price List for the J, K, OK
#24B Supplement to #24
#24C Supplement to #24
#25 Repair Parts list for the Wallis Certified Tractor (15-27 early 20-30)
#25A Repair Parts Price List for the Wallis Certified Tractor
#25AA Repair Parts Price List for the Wallis Certified Tractor
#25B Supplement to #25
#25C (Domestic) Supplement to #25
#25C (Export) Supplement to #25
#26 Repair Parts list for the Wallis Certified Tractor #58511 and up
#26M Repair Parts list for the Massey Harris 20-30 Tractor #58511 and up
#26J Repair Parts list for the Johnston Harvester 20-30 Tractor #58511 and up
#26B Supplement to #26
#26C Supplement to #26
#26C (Export) Supplement to #26, #26J, And #26M for export tractors
#27 Repair Parts list for the Massey Harris and Wallis 12-20 Tractor
#27M Repair Parts list for the Massey Harris 12-20 Tractor
#27J Repair Parts list for the Johnston Harvester 12-20 Tractor
#27B Supplement to #27, #27J, and #27M
Now I forgot about the #26J and #27J until now. I know I have seen a #27J on eBay before.