UPDATE II: Hans shared this photo of a Willys Rail truck’s speedometer. The Auf Schiene appears to translate as “on track”, meaning the interior speedometer should be used while driving on a track.

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UPDATE: This article features the third Delaware & Hudson Hy-Rail Jeep Truck. It appears to be either #152 or #162. The article appeared in the July 30, 1957, issue of the Press and Sun Bulletin out of Binghamton, NY:

Originally Posted September 04, 2014: This photo of Hy-Rail #K153 appeared for sale on eBay.

“”Delaware & Hudson MofW Hi-Rail Jeep K153 – 8×12 B&W Railroad Photo D&H””

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Originally Posted September 03, 2014: This photo of Hy-Rail #K148 appeared for sale on eBay.

“Brand New D&H Hi-Rail Jeep #K148 in 1957 – 8×10 Color Railroad Photo”