Hemingray Insulator Profile: CD 196  
This large one-piece style, marketed as the "Perfect Transposition", is more commonly found with the H.G.Co. embossing (in stark contrast to CD 201). Transposition styles were used for swapping the positions of two lines. This would reduce the interference that would otherwise be caused by two lines running parallel to each other for too long a distance. 

Dimensions: 5 1/2" H x 4 1/4" W
Primary
Embossings:
• H.G.CO.
• HEMINGRAY
Years Produced:
c.1910s
Style Number:51
Rarity Scale (1-10): Uncommon (5)
Trade Name: Perfect Transposition
Hobby Nickname: Tramp
Known Embossings (9) Collapse
 
H.G.CO. [005] (Dome) H (F-Skirt) H.G.CO. (R-Skirt) PAT. MAY 2 1893 SDP < WANTED! 
H.G.CO. [010] (F-Skirt) H.G.CO. (R-Skirt) PAT. MAY 2 1893 SDP < WANTED! 
H.G.CO. [015] (F-Skirt) H.G.CO. (R-Skirt) PATD MAY 2 1893 {Variation has RDP on the umbrella and SDP on the skirt} SDP < WANTED! 
H.G.CO. [020] (F-Skirt) H.G.CO. (R-Skirt) PATD MAY 2 1893 SDP Photo
H.G.CO. [030] (F-Skirt) H.G.CO. (R-Umbrella) PATENT APPLIED FOR (R-Skirt) PATD MAY 2 1893 SDP Photo
H.G.CO. [040] (F-Skirt) Nº 51 / H.G.CO. (R-Skirt) PAT. MAY 2 1893 SDP Photo
NEW! H.G.CO. [050] (F-Skirt) Nº 51/H.G.CO. (R-Skirt) PAT.MAY 2 1893 {Note there is a "3" offset and stamped over the "3"} SDP < WANTED! 
HEMINGRAY [010] (F-Umbrella) HEMINGRAY (F-Skirt) HEMINGRAY (R-Skirt) Nº 51 SDP Photo
HEMINGRAY [020] (F-Umbrella) HEMINGRAY (F-Skirt) Nº 51 (R-Skirt) HEMINGRAY SDP 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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