I was an apprentice at All Wheel Drive, Camberley from 1963. (From 1965 it was taken over by licensor Clark Equipment) I remember the 175 DS, (DS meant Dual Steer -driving position facing forward or aft) Modified from the Michigan 175 Series 1 of late 50's early 60's. They were built before I joined, but I did see a few during my time. I am much more familiar with the Military 275's built durimg the early 70's. As I was involved in the engineering and personally responsible for the performance and aceptance testing. There was an endurance test period we did at Clark's test site at Blackbushe Airfield.
Late in my apprenticeship in 1967 I was involved, with another apprentice, in producing the drawing for Dinky Toys to make their 1:43 scale model of the Michigan 180 dozer. The staff were offered models when they were issued in 1968, and I still have mine.
If anyone is inetersted I have a 3D model of a standard Michigan 175a Series on in my Sketchup 3D warehouse. It's very detailed 1:1 scale and mostly done from memory, but overall dimenionally correct within reason.
shttps://3dwarehouse.sketchup.com/model/579886383923e3d998b8c800ae001b66/Michigan-175-Tractor-Shovel
I have plenty of pics of the 275's during testing at Blackbushe.
Also of intest may be AWD/Smiths wading crane, another product for the military. I was personally involved with the last one we built which was some years after the initial production batch in 1973.
Regards Peter