Pinhole goes all the way through
Years produced: 1940
Style (CD) scarcity: 2, Less then 10 known
Intended use: Spark Gap Insulator
Notes: Experimental Spark Gap Insulator, based off a standard Hemingray 19 but with a modified top. Patented Jan 8, 1946, Patent No. 2,392,342. One of three prototype styles. In addition to the CD 186.1, there are the CD 186 and CD 186.2. All styles are rare, but the CD 186.2 seems to be the more available of the three.
|HEMINGRAY||||F-Skirt) HEMINGRAY-19/(Numbers and dots) (R-Skirt) MADE IN U.S.A./(Number)||SB||Clear|
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