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3D3DCobalt-glass insulator.
Pretty little antique cobalt-blue glass radio strain insulator. Amazing the price things things will fetch on eBay.
Source: eBay seller radaru
Contributor: Theodore Gray
Acquired: 28 February, 2009
Text Updated: 1 March, 2009
Price: $30
Size: 2"
Purity: 0.005%
Cobalt