Sylvania Gold Brand GB5687 - NOS - original box - 5687 vacuum tube best, Sylvania Gold Brand GB5687 - NOS - original box - 5687 vacuum tube cheap
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Sylvania Gold Brand GB5687 - NOS - original box - 5687 vacuum tube best, Sylvania Gold Brand GB5687 tubenew old stock - excellent conditionoriginal boxpins not gold.
Sylvania Gold Brand GB5687 tube
new old stock - excellent best condition
original box
pins not gold plated
tested on a Hickok KS 15874-L2 Cardmatic