Hemingray Insulator Profile: CD 1052  
This is a well-known dead-end spool type produced by Hemingray. Hemingray made with this with several embossings, including St. Louis Malleable, D-518, and even no embossing at all (although some unembossed versions were also produced by Whitall Tatum). 

Dimensions: 2 3/4" H x 3" W
Primary
Embossings:
• HEMINGRAY
• NO EMBOSSING
• NO NAME
• ST.LOUIS MALLEABLE
Years Produced:
c.1930s-1940s
Style Numbers:518, D-518
Rarity Scale (1-10): Fairly Common (4)
Usage: Dead End Spool
Trade Name: Secondary Rack Spool Insulator
Known Embossings (6) Collapse
 
HEMINGRAY [010] (Bottom) HEMINGRAY - 518 MADE IN U.S.A. {Embossing is on the flat end} SB Photo
NO EMBOSSING [010] [No embossing] SB Photo
NO NAME [010] (F-Below wire groove) D-518 [Numbers and dots] (R-Below wire groove) MADE IN U.S.A. {Hemingray product} SB Photo
NEW! NO NAME [020] (F-Above wire groove) 7 SB < WANTED! 
ST.LOUIS MALLEABLE [010] (F-Above wire groove) [Number] (Bottom) ST.LOUIS MALLEABLE CASTING CO./ST.LOUIS MO. SB Photo
ST.LOUIS MALLEABLE [020] (F-Below wire groove) D-518 [Number] (R-Below wire groove) MADE IN U.S.A. (Bottom) ST.LOUIS MALLEABLE CASTING CO./ST.LOUIS MO. SB Photo

The following embossings were removed from the price guide because they could not be verified to exist:

Unverified Embossings
Year Removed





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