Head-to-Head Comparison

Updated September 5, 2026

Tissot PRX Powermatic 80 vs Grand Seiko Godzilla 65th Anniversary SBGA405

Tissot's timepiece meets Grand Seiko's diver

Quick Verdict

The Tissot PRX Powermatic 80 ($500–$1,000) offers In-House Automatic (ETA C07.111 base) precision in the tier below the Grand Seiko Godzilla 65th Anniversary SBGA405 ($25,000+). The PRX Powermatic 80 measures 40mm and is rated 100m (10 ATM). The Godzilla 65th Anniversary SBGA405 counters with Made in Japan craftsmanship and 200m (20 ATM) water resistance. Both are exceptional watches for their respective tiers.

TissotPRX Powermatic 80$500–$1,000 Check price Grand SeikoGodzilla 65th Anniversary SBGA405$25,000+ Check price

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Tissot

PRX Powermatic 80

$500–$1,000

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Grand Seiko

Godzilla 65th Anniversary SBGA405

$25,000+

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Specifications Compared

Feature	Tissot PRX Powermatic 80	Grand Seiko Godzilla 65th Anniversary SBGA405
Price	$500–$1,000	$25,000+
Case Size	40mm	44.5mm
Movement	Automatic Powermatic 80.111	Spring Drive 9R15
Caliber Type	In-House Automatic (ETA C07.111 base)	Grand Seiko Spring Drive 9R15, rated +/-10 seconds per month
Power Reserve	80 Hours	About 72 hours
Water Resistance	100m (10 ATM)	200m (20 ATM)
Crystal	Scratch-resistant Sapphire	Sapphire Crystal
Case Material	316L Stainless Steel	High-intensity titanium
Origin	Swiss Made	Made in Japan

Category-by-Category Analysis

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Design & Aesthetics

Edge: Draw

Tissot's design language vs Grand Seiko's approach

The Tissot PRX Powermatic 80 features a 316L Stainless Steel case at 40mm with Scratch-resistant Sapphire protection. The Grand Seiko Godzilla 65th Anniversary SBGA405 offers High-intensity titanium construction at 44.5mm with Sapphire Crystal. Both represent their brand's distinct design philosophy and heritage.

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Movement & Performance

Edge: Tissot

Automatic Powermatic 80.111 vs Spring Drive 9R15

The PRX Powermatic 80 runs the Automatic Powermatic 80.111 (In-House Automatic (ETA C07.111 base), 80 Hours power reserve) at 21,600 vph (3 Hz) frequency. The Godzilla 65th Anniversary SBGA405 uses the Spring Drive 9R15 (Grand Seiko Spring Drive 9R15, rated +/-10 seconds per month, About 72 hours reserve) at standard. The PRX Powermatic 80 edges ahead on power reserve.

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Wearability & Fit

Edge: Tissot

40mm vs 44.5mm — different wrist presence

At 40mm, the PRX Powermatic 80 wears more compactly on smaller wrists compared to the Godzilla 65th Anniversary SBGA405 at 44.5mm. Water resistance differs: 100m (10 ATM) vs 200m (20 ATM).

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Value & Cost of Ownership

Edge: Tissot

Tissot sits in the lower tier

The Tissot PRX Powermatic 80 sits at $500–$1,000 and the Grand Seiko Godzilla 65th Anniversary SBGA405 at $25,000+. On the specs that outlast any price: the PRX Powermatic 80 uses Scratch-resistant Sapphire with 80 Hours, against Sapphire Crystal and About 72 hours on the Godzilla 65th Anniversary SBGA405. Service intervals are typically 5-7 years for both.

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Water Resistance

Edge: Grand Seiko

100m (10 ATM) vs 200m (20 ATM)

The PRX Powermatic 80 is rated to 100m (10 ATM) while the Godzilla 65th Anniversary SBGA405 handles 200m (20 ATM). The Godzilla 65th Anniversary SBGA405 offers superior water resistance.

Our Verdict

Tissot

PRX Powermatic 80

Choose the Tissot PRX Powermatic 80 if you prioritize In-House Automatic (ETA C07.111 base) engineering, Swiss Made craftsmanship, and 100m (10 ATM) water resistance. At $500–$1,000, it delivers Automatic Powermatic 80.111 with 80 Hours power reserve.

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Grand Seiko

Godzilla 65th Anniversary SBGA405

Choose the Grand Seiko Godzilla 65th Anniversary SBGA405 if you value Grand Seiko Spring Drive 9R15, rated +/-10 seconds per month technology, Made in Japan heritage, and 44.5mm proportions. At $25,000+, the Spring Drive 9R15 with About 72 hours power reserve makes it a compelling choice.

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The Bottom Line

The Tissot PRX Powermatic 80 and Grand Seiko Godzilla 65th Anniversary SBGA405 represent two distinct approaches to fine watchmaking — the Tissot bringing Swiss Made tradition while Grand Seiko delivers Made in Japan engineering.

Frequently Asked Questions

The Tissot PRX Powermatic 80 is the better buy if you want a mechanical movement; the Grand Seiko Godzilla 65th Anniversary SBGA405 is the better buy if you want quartz accuracy with no servicing. For water, the Grand Seiko Godzilla 65th Anniversary SBGA405 is rated 200 m against 100 m, which is the difference between swimming and diving on one side and splashes on the other. On price, the Tissot PRX Powermatic 80 sits a band lower ($500–$1,000 against $25,000+), so it is the cheaper way into the category. Neither is better at everything; the spec table above shows movement, case size, water resistance and crystal side by side so you can weigh what matters to you. We do not test units, so this is the makers' data, not a bench result.

The Tissot PRX Powermatic 80 offers better upfront value, sitting a tier lower at $500–$1,000. However, the Grand Seiko Godzilla 65th Anniversary SBGA405 may justify its premium with superior finishing, heritage, or resale value.

Both are suitable for daily wear. The PRX Powermatic 80 at 40mm with 100m (10 ATM) water resistance handles everyday situations. The Godzilla 65th Anniversary SBGA405 at 44.5mm with 200m (20 ATM) is similarly capable. The PRX Powermatic 80 uses Scratch-resistant Sapphire while the Godzilla 65th Anniversary SBGA405 uses Sapphire Crystal.

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How This Page Was Made

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.