| ALCO's first endcab diesel. The evolutionary link between the AGEIR boxcabs and the more powerful and successful High Hodd models. In 1929 the McIntosh & Seymour Diesel Engine Company, Auburn, NY, founded in 1885, was purchased by ALCO. In 1931 ALCO introduced new McIntosh & Seymour powered demonstration units #300 & #301 (300hp) and #600 (600hp). |
|

| build number | build date | road number | disposition |
|---|---|---|---|
| 68593 | 7/1931 | ALCO demo #301 | to LV #102 |
| 68602 | 12/1931 | LV #103 | - |
| 68603 | 3/1932 | ALCO demo #304 | to USN #11 |
| 68604 | 5/1932 | ALCO demo #305 | to USN #3 |
| 68605 | 5/1932 | ALCO demo #306 | to USN #4, Marre Island |
| 68698 | 6/1935 | USN #5 | to Jay Street Connecting RR #5 |
| 68699 | 9/1935 | USN #3(2nd) | - |
| Years Produced: | 1931-1935 |
| Number Produced: | 7 |
| Engine Type: |
McIntosh & Seymour 6 cyl. 9 1/2" x 10 1/2" |
| Horse Power: | 300 |


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