Help!!

[sameguy]

I was the national sales and marketing manager back in ~ 1984 for them.

 

[weressl]

Looks like a time delay relay. Theyre pretty common in that form factor except with the pot and knok on the top of the device. I havent seen one where the pot is external like that.

External pots are used to be an option when remote and contant adjsutment accessibility was required. All timer adjsutments used to be analog and the most common was a dial/knob on the top of the case.

http://www.time-mark.com/ProductDetail.aspx?id=3F&cp=0&ps=2&CategoryID=5