Here's some pics from the parts book that Stoney used to identified the wrench he found with the Cole Guano Spreader:
Catalog of Cole Cotton Planters, Combination Planters,
Plain View Seed Planters,Twin Plain View Planters,
Guano Sowers and Grain Drills
Cole Mfg. Co. - Charlotte, North Carolina
444 - Cast Wrench - $0.20
Nos 22, 23, 26, 26-1/2, 27, 51, 51-1/2, 60, 60-1/2,
61 and 61-1/2 Cole Distributors. (no parts list picture but a soe-S wrench is shown hanging on the No. 51 Cole Shoe-Feed Distributor and No 60 and 61 Cole "Labor Saving" Fertilizer and Bedder.
S-4 - Clevis - $0.20
Cole No. 1, 2, 3, 4, 5, 6, 7 and 8 Planters
Cole No. 20, 21, 24, 28, 48 and 52 Distributors
Cole No. 30, 33, 34, 35 and 26 Drills
(pictures clevis with a single open end pin/wrench)
(http://i222.photobucket.com/albums/dd3/buswrench/message-board/Cole-Parts-Book-001a-cover-ed-1.jpg)
(http://i222.photobucket.com/albums/dd3/buswrench/message-board/Cole-Parts-Book-003a-wrench-pic-ed.jpg)
(http://i222.photobucket.com/albums/dd3/buswrench/message-board/Cole-Parts-Book-004a-wrench-pic-ed.jpg)
(http://i222.photobucket.com/albums/dd3/buswrench/message-board/cole-444-wrench-2.jpg)