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Pole Top Discoveries' Event #2404
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#3535 CD 147 PATENTED Aqua.
- Sold Winning Bid: $130.00
- 2 Bid(s) View Bid History
- Lot # 3535
- System ID # 760928
- End Date
- Start Date
#3535 CD 147 PATENTED Aqua.
No other embossing.
This is a rather scarce embossing variant for a "spiral groove" insulator. Actually, this variant is much rarer than either the CD 110 or CD 150 with Brookfield marking.
The various spiral groove insulators were produced under J.C. Barclay's 1907 patent (see second image for patent drawing).
Match head flake on inner skirt and an in-the-making, small touch mark on dome, so it's graded very near mint.