Yeah, I noticed the dials there and wondered if they were temperature gauges. They look a lot like clocks, though. Surely there are more photos around. Your thought about the cooling ovens is a good one. You’d think a good metal worker would know what is going on in the photo.
And imagine trying to anneal all the silver dollars in those things. Check out the ovens on the bottom of this page. http://www.wckelsey.com/?m=200511
Collecting Flying Eagle and Indian Head pennies never made more cents!