Bulova 12 EBA Watch Spare Parts: Detailed Guide for Collectors and Watchmakers
The Bulova 12 EBA is a sophisticated automatic watch movement introduced in the mid-1960s, known for its precision and advanced engineering. Featuring 17 to 30 jewels and a diameter of approximately 28.5 mm, this calibre operates at 19,800 vibrations per hour and boasts a power reserve of about 54 hours. A standout feature is its micro-rotor design, which allows the movement to maintain a slim profile while enabling efficient self-winding. The 12 EBA also includes a digital display with jumping hour, minute, and traditional sweep seconds, making it a notable complication in vintage Bulova watches.
Key Technical Specifications
Calibre: Bulova 12 EBA
Movement Type: Automatic with micro-rotor and digital jump hour display
Jewels: 17 to 30 synthetic rubies
Diameter: 28.5 mm
Frequency: 19,800 vibrations per hour
Power Reserve: Approximately 54 hours
Era: Mid-1960s onward
Unique Feature: Slim profile due to micro-rotor design
Common Spare Parts
Balance Assembly & Staff: Maintains accurate oscillations and timekeeping
Mainspring & Barrel: Stores and provides consistent power
Escape Wheel & Pallet Fork: Regulate the escapement mechanism
Digital Display Components: Gears and levers for jumping hour and minute
Micro-Rotor & Axle: Powers the automatic winding system
Winding Stem & Crown: Allow manual winding and time adjustments
Shock Absorbers: Protect the movement from shocks and impacts
Hands & Dial Assemblies: Preserve the watch’s vintage aesthetic
Case Screws & Fasteners: Secure the movement inside the watch case
Maintenance and Sourcing Tips
Verify the “12 EBA” marking for authentic spare parts
Source New Old Stock (NOS) or original Bulova parts from reputable suppliers
Use detailed exploded movement diagrams for accurate repairs
Engage experienced watchmakers for complex servicing and restorations
Importance of Genuine Spare Parts
Ensure precision, durability, and extended movement life
Preserve Bulova vintage craftsmanship and collectible value
Facilitate expert-level reliable restorations
Using genuine Bulova 12 EBA spare parts is crucial for maintaining the heritage, accuracy, and longevity of these prized automatic micro-rotor movements, favored by horology enthusiasts globally.
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Watch Parts Enquiry
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Stem, Crown, Hands & Spares might be available for this movement.
Email us for rate and availability: [email protected]
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