Atwater-Kent 70

[droptop]

IIRC the can with the loose top contains the filter chokes. The dome top can next to it is the power transformer and the filter caps are in the other large box directly behind the power transformer. You are correct- the chassis just slid into the cabinet and had an oblong keyhole shaped wood block that swiveled on a screw into the shelf near the rear center of the chassis. Slide in the chassis and then rotate the block up to the edge of the chassis to hold it firmly in place. I’ve seen many of these with the speaker dangling out the back of the cabinet- usually at auctions where they don’t know or take time to look inside the cabinet. There was a paper attached to the floor of the cabinet showing how to mount the chassis and speaker but many times it's missing. I may have one around here somewhere that I can scan. Let me know if you need it and I'll look.

Majestic was another company good at bolting in the chassis but just letting the power supply sit loose in the cabinet. I’ve seen a few of these come flying out as well- even after mentioning it to the auction help.

I’ve found certain diameters of heater or manifold vacuum hose works well for the dial drive. Measure the distance between the pulley and the serrated edge of the dial plate for thickness and take the pulley to the auto store so you can match or get close to the thickness and ID of the hose.