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Open balance wheel architecture
Automatic Japanese Miyota caliber
Integrated stainless steel bracelet
Ergonomic offset winding crown
in stock: 1
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On the wrist, the SB.1.10628-3 establishes an immediate sense of scale and architectural mass. At 43.5mm across with a 49mm lug-to-lug stance, it wears broad and deliberate, anchored by an integrated case design that drops sharply toward the steel bracelet. The case finishing relies on clean, vertical brushing across the flat surfaces, contrasted by high-polished bevels along the flanks that catch raking light. It avoids feeling overly bulky thanks to the low-profile stepped bezel framing a multi-layered dial layout.
The dial execution leans into mechanical exposure without descending into visual chaos. Set against a deep, sunburst royal blue surface, the open-heart cutaway at 7 o’clock anchors the architecture, showcasing the balance wheel’s rapid 3 Hz oscillation. Flanking this aperture are twin offset sub-registers: a running small seconds indicator and an upper 24-hour military-time wheel, both rendered with concentric snailed texturing. The semi-skeletonized baton hands and faceted applied indices provide clear legibility against the industrial backdrop, while the repositioned crown at 2 o’clock prevents wrist bite during active movement.
Brand: Santa Barbara PRC
Gender: Men's
Brand Origin: United States
Series: Open Heart Automatic
Additional Information: Exposed escapement aperture; auxiliary 24-hour and small-second displays
Model: SB.1.10628-3
Movement: Automatic
Movement Source: Japan
Power Reserve: Approximately 42 Hours
Precision: -20 / +40 seconds per day
Features: Open Heart Escapement, 24-Hour Indicator, 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: Deep Blue
Case Color: Silver Tone
Band Color: Silver Tone
Bezel: Fixed Smooth
Bezel Color: Silver Tone
Bezel Material: Stainless Steel
Case Material: Stainless Steel
Band Material: Stainless Steel
Water Resistance: 50 Meters / 5 ATM
Functions: Hours, Minutes, Small Seconds, 24-Hour Display
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 Hour Markers
Barcode: Not Specified
Known By: Santa Barbara Polo Open Heart Blue SB.1.10628-3
Founded in 1911 on the sun-drenched coast of Southern California, the Santa Barbara Polo & Racquet Club has long stood as an iconic bastion of American equestrian sport. The club's horological line emerged from an ambition to capture that distinct sporting pedigree—steeped in competition, equestrian leisure, and refined presence—and translate it into accessible, high-impact modern wristwear.
Historically, sports club timepieces favored conservative dress geometry, but the brand’s contemporary catalog took a definitive turn toward sport-luxe structuralism. Moving beyond conventional profiles, modern lineups embrace angular case architecture, integrated link assemblies, and layered dial treatments. The collection honors its athletic roots not through vintage pastiche, but by engineering bold, high-visibility instruments built for daily wear.
Powering the SB.1.10628-3 is the Miyota Caliber 82S7, a specialized automatic workhorse engineered by Citizen’s movement division in Japan. Built upon Miyota's resilient 8000-series architecture, the 82S7 is purpose-built to facilitate open-heart dial executions without compromising the structural rigidity or timekeeping stability of the underlying gear train.
The movement operates at an escapement frequency of 21,600 vibrations per hour (3 Hz), translating to six discrete beats per second. It integrates 21 synthetic ruby jewels positioned strategically across high-friction pivots, ensuring minimal mechanical resistance and sustained operational longevity. A single mainspring barrel supplies an autonomous power reserve of roughly 42 hours when fully wound. Winding is driven by a unidirectional oscillating weight mounted on ball bearings, supplemented by smooth hand-winding capability through the crown mechanism.
