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Open balance wheel architecture
Japanese automatic Miyota caliber
Black ion plated steel
Ergonomic offset winding crown
in stock: 1
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Open balance wheel architecture
Japanese automatic Miyota caliber
Black ion plated steel
Ergonomic offset winding crown
Brand: Santa Barbara PRC
Gender: Men's
Brand Origin: United States
Series: Open Heart Automatic
Additional Information: Exposed balance wheel aperture; dual 24-hour and running small-second sub-dials
Model: SB.1.10628-5
Movement: Automatic
Movement Source: Japan
Power Reserve: Approximately 42 Hours
Precision: -20 / +40 seconds per day
Features: Open Heart Balance, 24-Hour Display, Small Seconds
Engine: Miyota Caliber 82S7
Jewels: 21 Jewels
Caliber No: 82S7
Case Size: 43.5 mm
Lug-to-lug: 49.0 mm
Case Thickness: 13.0 mm
Band Width: 22 mm
Band Type: Bracelet
Dial Color: Black
Case Color: Black
Band Color: Black
Bezel: Fixed Smooth
Bezel Color: Black
Bezel Material: Stainless Steel
Case Material: Stainless Steel (Black Ion-Plated)
Band Material: Stainless Steel (Black Ion-Plated)
Water Resistance: 50 Meters / 5 ATM
Functions: Hours, Minutes, Small Seconds, 24-Hour Indicator
Calender: None
Watch Style: Sport Luxury
Weight: Not Specified
Warranty: 2 Years Official Brand Warranty
Case Back: Exhibition Case Back
Case Shape: Round
Clasp: Butterfly Deployant Clasp
Crystal: Mineral Crystal
Crystal Coating: Not Specified
Crown: Offset Push / Pull Crown
LumiBrite: Luminescent Hands and Applied Markers
Barcode: Not Specified
Known By: Santa Barbara Polo Open Heart Black SB.1.10628-5
Established in 1911 along the Pacific coast of Southern California, the Santa Barbara Polo & Racquet Club stands among the oldest equestrian sports institutions in North America. The brand's watchmaking wing took flight from an ambition to distill this sporting heritage—characterized by high-intensity polo competition, equestrian prestige, and coastal leisure—into robust, everyday horological instruments.
While early catalog entries adhered to traditional dress watch profiles, the collection experienced a pivotal shift toward modern sport-luxe geometry. Contemporary lineups moved deliberately away from generic three-hand formats, adopting integrated bracelet architecture, sculpted casework, and complex dial layering. The design language honors its equestrian roots not through nostalgic vintage mimicry, but by engineering assertive, high-impact timepieces tailored for modern urban life.
Ticking beneath the multi-layered dial of the SB.1.10628-5 is the Miyota Caliber 82S7, a specialized self-winding mechanical engine manufactured in Japan by Citizen Watch Co. Recognized across independent horology as an exceptionally durable workhorse, the 82S7 is purpose-engineered to accommodate skeletonized and open-heart configurations without sacrificing structural stability or long-term timekeeping consistency.
The movement beats at a frequency of 21,600 vibrations per hour (3 Hz), translating to six precise balance oscillations per second. It incorporates 21 synthetic ruby jewels positioned at high-wear arbor pivots to minimize frictional resistance and maintain efficient energy transmission across the gear train. A single mainspring barrel delivers a dependable power reserve of approximately 42 hours when fully wound. Winding is driven by a weighted unidirectional ball-bearing rotor, supplemented by manual hand-winding capability through the crown for quick power replenishment.
