1F308 & 1F312 Octagonal Metal Case

CASE Metal, octagonal; statuary bronze lacquer finish with bronze finished pendant resetting knob or white lacquer finish with nickel finished pendant resetting knob. Convex crystal. DIAL Light grey background with black characters on light cream numeral band. CORD Furnished with 8 ft. art. silk cord attached bearing Underwriters' Laboratories Label. Brown color for statuary bronze case and white for white case.
 

Even the names were all business in these commercial clocks.  The 1F308 case is  10 inches wide & the 1F312 is 14.  The Octagonal Metal Case is featured below in this scene from "O' Brother Where Art Thou?"
 
back to the Golden Age of Telechronto the 1B515 Commercial Clock