Bulova 12EBACD (Buren 1322) movement – specifications and photo

Bulova 12EBACD (Buren 1322) is Swiss movement from 1960’s.

Functions: sweep second, date – changing between 23 and 24 h

Automatic movement with 17 or 30 jewels

f = 19800 A/h

Power reserve: 54 hours

Diameter: 28.15 mm

More information:

Angle of lift: 48°, micro rotor, double jewel bearing if 30 jewels double excenter
regulator for curb pins and stud carrier
selfwinding gear with direction switching by a pinion floating between two huge jewels

Oscillating weight set in the movement. No additional height taken up by the self-winding mechanism. Oscillating
weight made of heavy antimagnetic alloy. Mechanical inverser on roller bearings: no wear. Automatic engaging and disengaging of manual and automatic winding. Thus only the operating gear turns, performance is improved and there is no wear. Sliding pinion set between large jewels.

Bulova 12EBACD (Buren 1322) – Technical Bulletin

Spare parts for Bulova 12EBACD (Buren 1322)

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Bulova A-11 Navigation (Hack) Watch U. S. Army

Type A-11 Hack Navigation Watch, manufactured by the Bulova Watch Company, in accordance with U. S. Army Specification No. 94-27834-B and Amendment No. 1 dated January 17, 1944.

The type A-11 hack navigation watch is intended for use as an auxiliary to Master Navigation Watches AN5740 in the navigation of aircraft. It consists of a case, watch movement and suitable strap for fastening to the wearer’s wrist. The case is manufactured of nickel silver with a stainless steel threaded back. The watch movement is adjusted in two positions to the tolerances shown in U. S. Army Specification No. 94-27B34-B and Amendment No.1.

In a later model a convetional three-piece dustproof case is used. The case and screw-in bezel are chromium plated brass or nickel silver and the screw-on back is of stainless steel.

The hands, numerals and graduations are painted white. The dial has a dull durable black surface. The watch is equipped with a center pivoted sweep second hand in a addition to the regular hour and minute hands.

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A History of USA Military Wristwatches WW2

To the World War II vet this may be a Hamilton, to the Vietnam vet it’s a plastic Benrus, and to the soldiers in the sandbox it’s anything from a Marathon to a Casio G-Shock. While many of the pieces are military specified, others are commercial watches favored by fighting men and women. What is a military specified timepiece? Essentially it’s a United States Defense standard, often called a military standard and abbreviated MIL-STD, MIL-SPEC or (informally) MilSpecs. These are used to help achieve standardization objectives by the U.S. Department of Defense. Standardization helps ensure that products meet certain requirements, commonality, reliability, total cost of ownership and compatibility with logistics systems. The military has been “specifying” equipment standards for well over a century. Virtually any company can make a product that conforms to published military specifications; however, there’s a difference between military spec and military issued. A military issued product is one that has been selected and awarded a contract for manufacture by the Department of Defense and becomes a line item on a government budget. Many commercially available watches conform to MIL-SPEC and may even appear in combat, but were never procured by the government. With MIL-PRF (Military Performance … Continue reading...

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