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49 years old — Longines — Ultronic Tunig-fork — Cal 6312 — Vintage 1976

49 years old — Longines — Ultronic Tunig-fork — Cal 6312 — Vintage 1976

EVW PRODUCT NR: 1702-08

49 years old — Longines — Ultronic Tunig-fork  — Cal 6312 — Vintage 1976
Smooth humming sweep, sharp 1970s geometry, mineral crystal for daily wear.

Collector Notes &  Dating
Longines Ultronic in stainless steel with the high-grade Longines cal. 6312 (ESA 9162) tuning-fork movement. The 37 mm angular tonneau case wears slim and modern; silver sunburst dial with applied baton markers, baton hands and framed date at 3 with quickset. Signed crown present. Crystal is mineral glass. Fitted on an aftermarket steel bracelet.

Cal. 6312 is a 12-jewel, ~300 Hz tuning-fork caliber from the ESA 9162/9184 family, designed under Max Hetzel (of Bulova Accutron 214 fame) and often dubbed the “Rolls-Royce” of tuning-fork movements. Movement no. 52956640 is recorded and dates to 1976. A clean, wearable slice of early electronic Longines with that unmistakable humming sweep.

SPECIFICATIONS
Movement: Longines 6312 (ESA 9162) tuning-fork, 12 jewels, ~300 Hz, quickset date.
Dial: Silver sunburst, applied batons, baton hands, framed date at 3.
Crystal: Mineral glass.
Case: Stainless steel, angular tonneau; snap back; light honest wear.
Size: 37 mm without crown.
Crown: Signed Longines; push/pull.
Strap/Bracelet: Aftermarket stainless-steel bracelet.
Water-Tightness: Splash resistant; not pressure-tested.
Box / Packaging: Secure travel watch case.

A wearable early-electronic Longines with premium tuning-fork tech and timeless 1970s styling.

📦 What’s Included
Box/Case: Travel watch case.
Documents: Invoice 

🚚 Shipping, Returns
Insured worldwide shipping with tracking; 14-day inspection return in unused condition.

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Normaler Preis $819.00 USD
Normaler Preis Verkaufspreis $819.00 USD
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