Working Jeep Photographic Slides on eBay

Here are three photos of working jeeps available on eBay.

1) CAMBRIDGE, MA Fire Apparatus SLIDE: LIGHTING UNIT-2:

2) 1961 Slide NIPSCO Northern Indiana Public Service wagon:

3) CJ-5 Unloading Circus Wagon Train 1980s:

4) 1961 Colorado Tour Jeep CJ-5: I'm unclear if this is a San Juan Scenic Tour Jeep or someone else running a tour. Davis tours was over by 1961.