UP M-4
| 1st M-4, 55 foot, retired 11/22, engine to M-27 |
Doodlebug
| 4 | 1 | 193615 |
UP M-8
| reblt to trailer T-18 in 1929 |
Doodlebug
| 8 | 1 | 193616 |
UP M-16
| McKeen, Built July 1911, to UP M-63, re# M-16 in 10/1917 |
Doodlebug
| 116 | 1 | 255216 |
UP M-19
| square rear windows |
Doodlebug
| 19 | 1 | 193614 |
UP M-24
| |
Doodlebug
| | 1 | 264271 |
UP M-83
| Built 5/13, ex-OWRR&N 607 |
Doodlebug
| | 1 | 271090 |