Vintage work crew photos

[Toolmaker51]

Why are they in uniform?

Ralph

Incredible patriotism? Bigger question. Since when dropping an engine [sans transmission BTW] into an open chassis needs 5 men with 1, maybe 2 and a hoist are sufficient elsewhere. Typical government excess.
I was ignorant. Campaign hats, canvas field gaiters, and wearing rings were recommended safety gear, yet not steel-toed boots?

Cool details in pic though. Bolt on cylinders, flat head valve arrangement, external coolant plumbing, with shaft-driven pump and more. Notice lubricant pots on suspension spring posts? Now that's engineering for long term and severe use! Frank S, you recall any such and more recent enhancements?