Boyarca Pilot Automatic vs Casio G-Shock GA-B2100 CasiOak
Boyarca's timepiece meets Casio's diver
Quick Verdict
The Boyarca Pilot Automatic ($50–$100) offers Automatic (Japan) precision in the tier below the Casio G-Shock GA-B2100 CasiOak ($100–$150). The Pilot Automatic measures mid-size and is rated for daily wear. The G-Shock GA-B2100 CasiOak counters with Made in Japan craftsmanship and 200m (20 ATM) water resistance. Both are exceptional watches for their respective tiers.
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Specifications Compared
| Feature | Boyarca Pilot Automatic | Casio G-Shock GA-B2100 CasiOak |
|---|---|---|
| Price | $50–$100 | $100–$150 |
| Case Size | — | 45.4mm (48.5mm lug-to-lug, 11.9mm thick) |
| Movement | Japanese Automatic | Quartz Module 5689 (Tough Solar + Bluetooth) |
| Caliber Type | Automatic (Japan) | Casio Quartz (Solar-Powered) |
| Power Reserve | — | About 7 months on a full charge without light; about 18 months in power-saving (Casio) |
| Water Resistance | — | 200m (20 ATM) |
| Crystal | — | Mineral Glass |
| Case Material | Stainless Steel | Carbon Core Guard Resin |
| Origin | Boyarca (Japanese movement) | Made in Japan |
Category-by-Category Analysis
Design & Aesthetics
Boyarca's design language vs Casio's approach
The Boyarca Pilot Automatic features a Stainless Steel case at mid-size with crystal protection. The Casio G-Shock GA-B2100 CasiOak offers Carbon Core Guard Resin construction at 45.4mm (48.5mm lug-to-lug, 11.9mm thick) with Mineral Glass. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Japanese Automatic vs Quartz Module 5689 (Tough Solar + Bluetooth)
The Pilot Automatic runs the Japanese Automatic (Automatic (Japan), standard power reserve) at standard frequency. The G-Shock GA-B2100 CasiOak uses the Quartz Module 5689 (Tough Solar + Bluetooth) (Casio Quartz (Solar-Powered), About 7 months on a full charge without light; about 18 months in power-saving (Casio) reserve) at standard. The G-Shock GA-B2100 CasiOak offers a longer power reserve.
Wearability & Fit
Mid-size vs 45.4mm (48.5mm lug-to-lug, 11.9mm thick) — different wrist presence
At 40mm, the Pilot Automatic wears more compactly on smaller wrists compared to the G-Shock GA-B2100 CasiOak at 45.4mm (48.5mm lug-to-lug, 11.9mm thick). Water resistance differs: 50m vs 200m (20 ATM).
Value & Cost of Ownership
Boyarca sits in the lower tier
The Boyarca Pilot Automatic sits at $50–$100 and the Casio G-Shock GA-B2100 CasiOak at $100–$150. On the specs that outlast any price: the Pilot Automatic uses a hardened crystal with a standard reserve, against Mineral Glass and About 7 months on a full charge without light; about 18 months in power-saving (Casio) on the G-Shock GA-B2100 CasiOak. Service intervals are typically 5-7 years for both.
Water Resistance
50m vs 200m (20 ATM)
The Pilot Automatic is rated to 50m while the G-Shock GA-B2100 CasiOak handles 200m (20 ATM). The G-Shock GA-B2100 CasiOak offers superior water resistance.
Our Verdict
Boyarca
Pilot Automatic
Choose the Boyarca Pilot Automatic if you prioritize Automatic (Japan) engineering, Boyarca (Japanese movement) craftsmanship, and reliable water resistance. At $50–$100, it delivers Japanese Automatic with solid power reserve.
Check Price on AmazonCasio
G-Shock GA-B2100 CasiOak
Choose the Casio G-Shock GA-B2100 CasiOak if you value Casio Quartz (Solar-Powered) technology, Made in Japan heritage, and 45.4mm (48.5mm lug-to-lug, 11.9mm thick) proportions. At $100–$150, the Quartz Module 5689 (Tough Solar + Bluetooth) with About 7 months on a full charge without light; about 18 months in power-saving (Casio) power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Boyarca Pilot Automatic and Casio G-Shock GA-B2100 CasiOak represent two distinct approaches to fine watchmaking — the Boyarca bringing Boyarca (Japanese movement) tradition while Casio delivers Made in Japan engineering.
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Our comparisons are generated from a hand-maintained specification database and reviewed under our editorial standards. We use AI tools to assemble pages from that data. We don’t invent specs: every number traces back to the database, and when we correct an entry, the fix is applied site-wide. As an Amazon Associate, The Horologist earns from qualifying purchases.