![](http://www.alamy.com/thumbs/6/4F1EBC46-999D-48CE-8E41-F0E951B70064/D4AK37.jpg)
Model 71, 31/2 ton, Change from chain to worm drive. 1914. [...
Size: 1617px × 1236px
Photo credit: © pf / Alamy / Afripics
License: Licensed
Model Released: No
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