Breitling Premier Top Time B21 Chronograph Tourbillon Ford Mustang
NB21251A1L1X1 Historical
Live family-index execution
Case
direct Dimensions and fit
Case length42 mm
Case width / diameter42 mm
Case thickness15.4 mm
Lug-to-lugNot recorded
Lug widthNot recorded
Water resistanceNot recorded
The dimension basis is not currently recorded.
Open dimension source ↗Movement
AutomaticCalibre and mechanism
CalibreBreitling B21
Normalized calibreBREITLINGB21
GenerationNot recorded
Power reserve55 h
Technical data
Linked to sourced calibre programme Conventional winding
ApplicabilityRequired
DirectionCW
TPD minimum800
TPD target800
TPD maximum800
Conventional winding fields are evidence-linked reference data. They are separate from any device-specific axial-control profile.
Open winding source ↗Market context
Date not recordedMarket-value disposition
No exact-reference public market estimate has been admitted for this record.
Market observations are separate from manufacturer specifications and are not used to fill technical gaps.