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NOS Holy Grail 1944 Sylvania 6SN7A Metal Base, Long Bottle, Copper Rod tube. USN
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NOS Holy Grail 1944 Sylvania 6SN7A Metal Base, Long Bottle, Copper Rod tube. USN

Starting price (see what it sold for on eBay ↗) $549.00 as of Jul 28, 2026
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Past Vintage Parts & Accessories auctions
Condition New
Condition tiers New Used Refurbished Damaged Unspecified
Ships from ZIP 217**
old-electronics 2,836 ratings · 100.00% positive
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Description

From the seller
Amplitrex Tested. Finding one stamped as a "6SN7A" on the glass with the "K 4" 1944 code confirms it as one of the earliest, rarest iterations of the 6SN7 tube. 6SN7A 131/122 103/103 2700/2700. Tube was checked for shorts, gas, noise, heater to cathode leakage, and microphonics.

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