This is a September 1965 Fender Twin Reverb (AB763 circuit) — one of the most iconic and desirable amps ever built. This example is exceptionally original and well-documented, with the perfect balance of collector-grade authenticity and player-ready functionality.

✅ Features & Originality

Circuit & Chart: AB763, tube chart stamp “OI” (Sept 1965).

Transformers: All original Schumacher iron, correct 1965 date codes:
Power 125P34A – 606-532 (32nd week of 1965)

Output 125C1A – 606-513 (13th week of 1965)

Choke – 606-519 (19th week of 1965)

Reverb – 606-513

Speakers: Pair of Jensen C12Ns, codes 220-541 & 220-551 (Oct & Dec 1965). One even has a handwritten note on the label: “How’s that sound” — a unique period detail.

Caps & Wiring:

• Original blue molded coupling caps and Astrons intact
• Original GE electrolytics still in the doghouse (!!)
• A couple of small electrolytic bypass caps replaced — tasteful, minimal service
• Original cloth-covered wiring with correct lead dress
  
• Power Cord: Converted to 3-prong for safety (work could be tidied, but functional).
• Cabinet: Original black tolex, silver/tan grill cloth with Fender “tail” logo, tilt-back legs, finger-jointed pine cab, original baffle.

🔍 Condition

Cosmetics: Honest wear but very clean for nearly 60 years old.

Electronics: Over 95% original, with only minimal service.

Functionality: Works as-is, but as with all vintage amps, a cap job and service are recommended if this will be a daily player.

🎵 Sound

This amp delivers the tone that defined countless records — enormous headroom, lush reverb, shimmering Blackface cleans, and glorious breakup when pushed. With the original Jensen C12Ns and Schumacher iron, the sound is as authentic as it gets.

💵 Value

Collector grade (as-is, with originality intact): $4,500 – $5,500+

Player grade (if serviced/recapped, original parts bagged): $3,500 – $4,000

This listing is priced fairly given originality, condition, and market comparables.

🔥 A true pre-CBS Fender Twin Reverb with original iron, speakers, caps, and cosmetics intact. Rarely do you see one this complete and unmolested. Perfect for collectors, recording studios, or players who want the real Blackface sound.