Hello Dave;  My name is Curtis Stimpson I live in Los Angeles.  I have been trying to make contact with you guys for some time now Thank you for all of your wonderful info on these great old neon  
clocks!     I just found this clock in Los Angeles and after looking for
neon clocks in LA for 20 years and had never seen or even heard of  
Wesco MFG Co.  It was a great surprise to see.   It's 21" in Dia.
It has a 1/2" glass face with the letters etched in from behind, edge lit from a neon tube.  Another glass covers the hands and face held in  
by the outer bezel .   It weighs a ton  I would say about 35 Lbs.  Why  
so heavy?  It's made of Monel,   Monel is a metal they used in ship  
building durning the second world war.  It's a high nickel alloy that  
is corrosive resistant.   So companies that used aluminium  to build  
aircraft for the war later made clocks or travel trailers.  This  
company may of had a surplus of Monel.   Just My Guess!   Curtis.