✨ SYLVANIA GOLD BRAND GB-5687 / 5687 – NOS/NIB – BLACK PLATES – GOLD PINS – PERFECTLY MATCHED PAIR

🇺🇸 Made in USA • Sylvania Gold Brand • Original Boxes

🎵 RARE & HIGHLY SOUGHT-AFTER SYLVANIA 5687

The Sylvania Gold Brand (GB) 5687 is one of the more desirable vintage versions of the 5687, especially the black-plate, gold-pin construction.

Sylvania Gold Brand tubes were produced as premium-grade tubes and have long been sought after by tube collectors and serious audio enthusiasts. Genuine examples in NOS/NIB condition, with the original boxes and gold pins, are becoming increasingly difficult to find.

This pair is particularly attractive as both tubes are new old stock, never used, and form a closely matched pair.

🔬 TESTING – TV-7

Tested on a TV-7 tube tester.

📊 On the TV-7 reference scale:

• Minimum Good: 38 ≈ 65%

• Maximum: 70 ≈ 100%

These numbers are the reference values shown on the TV-7, not the actual readings of the tubes.

📸 For the actual test results of this pair, please see the tube tester reading shown in the photos.

⭐ The pair has been selected as a matched pair with essentially identical test performance.

📦 CONDITION

✨ NOS / NIB – New Old Stock / New In Box

✨ Never used

✨ Original Sylvania Gold Brand boxes

✨ Black plates

✨ Gold pins

✨ Clean original construction

The tubes themselves are in excellent vintage condition. The original boxes naturally show some age and storage wear. Please see all photos carefully for the exact condition.

🎯 WHY THIS PAIR IS SPECIAL

The combination of Sylvania Gold Brand + black plates + gold pins + NOS/NIB condition + original boxes + closely matched performance makes this a particularly desirable pair for collectors and high-end tube-audio enthusiasts.

Finding genuine Sylvania GB-5687s in this condition, especially as a matched pair, is increasingly difficult.

🛡️ 30-DAY WARRANTY

All tubes are covered by our 30-day warranty.

📮 SHIPPING

📬 Regular Mail / Standard International Mail is the standard shipping option.

⚡ EXPRESS SHIPPING: Available upon request for an additional charge. Please contact us if you need faster shipping.

🎶 A beautiful NOS Sylvania Gold Brand GB-5687 pair — black plates, gold pins, original boxes and carefully tested as a matched pair.