That's a #11 Auto Patrol built 1934 to 1937. Uses 5500G 4-1/2 x 5-1/2 bore engine same as R3.
I believe it was single wheel drive originally.
Thanks to Old Magnet for the information on the Auto Patrol Am including a couple pictures that kind of make me think that this unit may have had dual wheels. The rims are 7 inches wide at the base and 27 inches to the outside of the rims. The one pictures has a spacer like duels use. The wheel that is mounted on this rim is a 13 x 24. I may be all wet so let me know your thoughts. Thanks for any assistance.
Our channel highlights machines from the earliest Holt and Best track-type tractors, equipment from the start of Caterpillar in 1925, up to units built in the mid-1960s.
Chapter Fifteen
| Placerville, CAChapter Nineteen
| 1234 Carngham-Lake Goldsmith Rd, Lake Goldsmith, Victoria, 3373, AustraliaChapter Two
| Stradsett, Nr Downham Market. Norfolk PE33 9HA UKChapter Two
| Faulkner Farm, West Drove, Wisbech, Cambridgeshire, PE14 7DP, UK
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