Updated
Rolex Lady-Datejust 26 79173 (two-tone, cacholong dial with diamond 6 and 9, box and papers) vs Tissot Gentleman Powermatic 80 Silicium
Rolex's timepiece meets Tissot's dress watch
Quick Verdict
The Tissot Gentleman Powermatic 80 Silicium ($500–$1,000) delivers ETA-Based Automatic with Silicon Hairspring technology in the tier below the Rolex Lady-Datejust 26 79173 (two-tone, cacholong dial with diamond 6 and 9, box and papers) ($10,000–$25,000). The Gentleman Powermatic 80 Silicium measures 40mm and is rated 100m (10 ATM). The Lady-Datejust 26 79173 (two-tone, cacholong dial with diamond 6 and 9, box and papers) justifies its premium with Swiss Made heritage and Automatic, Rolex calibre 2235, quickset date. Both represent excellent choices in the luxury watch category.
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Rolex
Lady-Datejust 26 79173 (two-tone, cacholong dial with diamond 6 and 9, box and papers)
$10,000–$25,000
Specifications Compared
| Feature | Rolex Lady-Datejust 26 79173 (two-tone, cacholong dial with diamond 6 and 9, box and papers) | Tissot Gentleman Powermatic 80 Silicium |
|---|---|---|
| Price | $10,000–$25,000 | $500–$1,000 |
| Case Size | 26mm | 40mm |
| Movement | Automatic, Rolex calibre 2235, quickset date | Powermatic 80.811 (Silicon Hairspring) |
| Caliber Type | Rolex 2235, chronometer certified | ETA-Based Automatic with Silicon Hairspring |
| Power Reserve | About 42 hours | 80 Hours |
| Water Resistance | 100m (10 ATM) | 100m (10 ATM) |
| Crystal | Sapphire Crystal, Cyclops | Sapphire Crystal |
| Case Material | Oystersteel with 18k yellow gold fluted bezel (yellow Rolesor) | Stainless Steel |
| Origin | Swiss Made | Swiss Made (Swatch Group) |
Category-by-Category Analysis
Design & Aesthetics
Rolex's design language vs Tissot's approach
The Rolex Lady-Datejust 26 79173 (two-tone, cacholong dial with diamond 6 and 9, box and papers) features a Oystersteel with 18k yellow gold fluted bezel (yellow Rolesor) case at 26mm with Sapphire Crystal, Cyclops protection. The Tissot Gentleman Powermatic 80 Silicium offers Stainless Steel construction at 40mm with Sapphire Crystal. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic, Rolex calibre 2235, quickset date vs Powermatic 80.811 (Silicon Hairspring)
The Lady-Datejust 26 79173 (two-tone, cacholong dial with diamond 6 and 9, box and papers) runs the Automatic, Rolex calibre 2235, quickset date (Rolex 2235, chronometer certified, About 42 hours power reserve) at standard frequency. The Gentleman Powermatic 80 Silicium uses the Powermatic 80.811 (Silicon Hairspring) (ETA-Based Automatic with Silicon Hairspring, 80 Hours reserve) at 21,600 vph (3 Hz). The Gentleman Powermatic 80 Silicium offers a longer power reserve.
Wearability & Fit
26mm vs 40mm — different wrist presence
At 26mm, the Lady-Datejust 26 79173 (two-tone, cacholong dial with diamond 6 and 9, box and papers) wears more compactly on smaller wrists compared to the Gentleman Powermatic 80 Silicium at 40mm. Water resistance differs: 100m (10 ATM) vs 100m (10 ATM).
Value & Cost of Ownership
Tissot sits in the lower tier
The Rolex Lady-Datejust 26 79173 (two-tone, cacholong dial with diamond 6 and 9, box and papers) sits at $10,000–$25,000 and the Tissot Gentleman Powermatic 80 Silicium at $500–$1,000. On the specs that outlast any price: the Lady-Datejust 26 79173 (two-tone, cacholong dial with diamond 6 and 9, box and papers) uses Sapphire Crystal, Cyclops with About 42 hours, against Sapphire Crystal and 80 Hours on the Gentleman Powermatic 80 Silicium. Service intervals are typically 5-7 years for both.
Water Resistance
100m (10 ATM) vs 100m (10 ATM)
The Lady-Datejust 26 79173 (two-tone, cacholong dial with diamond 6 and 9, box and papers) is rated to 100m (10 ATM) while the Gentleman Powermatic 80 Silicium handles 100m (10 ATM). Both offer identical water resistance ratings.
Our Verdict
Rolex
Lady-Datejust 26 79173 (two-tone, cacholong dial with diamond 6 and 9, box and papers)
Choose the Rolex Lady-Datejust 26 79173 (two-tone, cacholong dial with diamond 6 and 9, box and papers) if you prioritize Rolex 2235, chronometer certified engineering, Swiss Made craftsmanship, and 100m (10 ATM) water resistance. At $10,000–$25,000, it delivers Automatic, Rolex calibre 2235, quickset date with About 42 hours power reserve.
Check Price on AmazonTissot
Gentleman Powermatic 80 Silicium
Choose the Tissot Gentleman Powermatic 80 Silicium if you value ETA-Based Automatic with Silicon Hairspring technology, Swiss Made (Swatch Group) heritage, and 40mm proportions. At $500–$1,000, the Powermatic 80.811 (Silicon Hairspring) with 80 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Rolex Lady-Datejust 26 79173 (two-tone, cacholong dial with diamond 6 and 9, box and papers) and Tissot Gentleman Powermatic 80 Silicium represent two distinct approaches to fine watchmaking — the Rolex bringing Swiss Made tradition while Tissot delivers Swiss Made (Swatch Group) engineering.
Frequently Asked Questions
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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.