Bulova 10BPAC

Update

Basic Information

NameBulova 10BPAC
ManufacturerBulova
Launch Year1955
Caliber FamilyDescription
10.5" , Bulova shock protection:
10BOAC: automatic, sweep second

10.5" , Kif-Flector:
10BNCH: manual wind, sweep second, hack feature
10BNCHR: same, further details uncertain
10BP: manual wind, sub second
10BPA: automatic, sub second
10BPAC: automatic, sweep second
10BPAD: automatic, sub second, date
10CBACD: automatic, sweep second, day, date pointer

11.5" , Kif-Flector:
11AC: manual wind, sub second
11ACA: automatic, sub second
11ACC: automatic, sweep second
11ACC: manual wind, sweep second
Likely not all feasable variants were actually were produced. Here only actually existing are listed, probably not all.

Related calibers
Bulova 10BOAC, Bulova 10BPA, Bulova 10BPAC, Bulova 10BPAD, Bulova 11AC, Bulova 11ACA, Bulova 11ACAC, Bulova 11ACC
Is COSC certifiedNo

Technical Details

Lignes Dimensions10.5 ‴
Dimensions23.7 mm
Height5.85 mm
Further MeasuresMounting Diameter (Dm): 23.3mm
Stem height (T): 1.7mm
Mounting Height (F): 1.4mm
Power Reserve41 hours
Frequency18,000 vph
Jewels30

Complications and Specifications

ShapeRound
Complications
  • Sweep Second
Shock ProtectionKIF
Regulator TypePinned Regulator (or Index Regulator)
Movement TypeAutomatic
Rotor TypeCentral Rotor
Escapement TypeSwiss Lever
Control TypeBalance Wheel
Winding TypeAutomatic (Rotor-Driven)
Setting TypeStem Set (Crown Pull)

Additional Information

Hand Sizes1.40 x 0.85 x 0.18mm
Hand Count3
Country Of Manufacture(not set)
NotesRemarks: 1955-1958
Other data: balance staff: U2479 stem: W2774 balance staff ronda: 4250 (10,5) stem ronda: 837 (10,5)
Ranfft mentioned about this caliber: There are variants with this quantity of jewels 23, 30
Signature1958: Bulova-U.S.A., 6 Adjustments, Heat- Cold- Isochronism- 3 Positions, 23 Jewels; Kif-Flector
Import Codes

Metadata

Created AtSep 15, 2023
Updated AtApr 23, 2025, 11:31:15 PM