Updated
Tissot PRX 35mm vs PRX 40mm Powermatic 80
Same watch, two sizes
Quick Verdict
The Tissot PRX Powermatic 80 in 35mm and in 40mm share the same specification: Powermatic 80 automatic with an 80-hour reserve, sapphire crystal, 100m and a date, both in the $500–$1,000 band. The only meaningful difference is size. Choose the 35mm for wrists under about 6.5 inches or a vintage look; choose the 40mm for average and larger wrists.
Transparency — We earn a small commission on purchases made through our Amazon links. This doesn't affect our editorial independence.
Specifications Compared
| Feature | Tissot PRX Powermatic 80 35mm | Tissot PRX Powermatic 80 |
|---|---|---|
| Price | $500–$1,000 | $500–$1,000 |
| Case Size | 35mm | 40mm |
| Movement | Automatic Powermatic 80 (Caliber 80.111) | Automatic Powermatic 80.111 |
| Caliber Type | ETA/Tissot Automatic | In-House Automatic (ETA C07.111 base) |
| Power Reserve | 80 Hours | 80 Hours |
| Water Resistance | 100m (10 ATM) | 100m (10 ATM) |
| Crystal | Sapphire Crystal | Scratch-resistant Sapphire |
| Case Material | Stainless Steel | 316L Stainless Steel |
| Origin | Swiss Made | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Identical design at two scales
Both have the PRX integrated bracelet, waffle-textured dial and date. The 35mm looks more delicate and vintage; the 40mm is bolder. Same design language either way.
Movement & Performance
Same Powermatic 80
Both run the Powermatic 80 (calibre 80.111), 23 jewels at 21,600 vph, with an 80-hour reserve. No difference.
Durability & Water Resistance
Same sapphire and 100m
Both have sapphire crystals and are rated to 100m (10 ATM). No difference.
Wearability & Fit
35mm against 40mm: this is the decision
Integrated bracelets tend to wear larger than the case number suggests, because the bracelet flows straight out of the case. That is why many people with average wrists find the 35mm more comfortable than they expect. Wrists under about 6.5 inches usually suit the 35mm; above about 7 inches, the 40mm.
Value & Cost of Ownership
Same band
Both sit in the $500–$1,000 band. Service needs are the same, since the movement is the same.
Our Verdict
Tissot
PRX Powermatic 80 35mm
Choose the PRX 35mm if your wrist is on the smaller side or you like the look of vintage-sized watches. Everything that makes the PRX the PRX is still there.
View the dossierTissot
PRX Powermatic 80
Choose the PRX 40mm if your wrist is average or larger, or you want the more modern sports-watch presence. It is the original size and the one most people picture.
Check Price on AmazonThe Bottom Line
The Tissot PRX Powermatic 80 is offered in 35mm and 40mm cases with the same Powermatic 80 movement, 80-hour power reserve, sapphire crystal and 100m water resistance, so the choice between them comes down to wrist size.
Frequently Asked Questions
More Comparisons
Explore These Watches
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.