Tissot PRX Powermatic 80 vs Tudor Black Bay 58
Tissot's timepiece meets Tudor's diver
Quick Verdict
The Tissot PRX Powermatic 80 (~$850) offers In-House Automatic (ETA C07.111 base) precision at $3,630 less than the Tudor Black Bay 58 (~$4,480). The Black Bay 58 counters with Swiss Made craftsmanship and 200m (20 ATM) water resistance. Both are exceptional watches for their respective price points.
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Specifications Compared
| Feature | Tissot PRX Powermatic 80 | Tudor Black Bay 58 |
|---|---|---|
| Price | ~$850 | ~$4,480 |
| Case Size | 40mm | 39mm |
| Movement | Automatic Powermatic 80.111 | Automatic Manufacture Calibre MT5402 |
| Caliber Type | In-House Automatic (ETA C07.111 base) | In-House Automatic Manufacture (Kenissi) |
| Power Reserve | 80 Hours | 70 Hours |
| Water Resistance | 100m (10 ATM) | 200m (20 ATM) |
| Crystal | Scratch-resistant Sapphire | Domed Sapphire |
| Case Material | 316L Stainless Steel | 316L Stainless Steel |
| Origin | Swiss Made | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Tissot's design language vs Tudor's approach
Movement & Performance
Automatic Powermatic 80.111 vs Automatic Manufacture Calibre MT5402
Wearability & Fit
40mm vs 39mm — different wrist presence
Value & Cost of Ownership
Tissot is $3,630 more affordable
Water Resistance
100m (10 ATM) vs 200m (20 ATM)
Materials Face-Off
| Component | Tissot PRX Powermatic 80 | Tudor Black Bay 58 |
|---|---|---|
| Case alloy | Stainless steel 316L (medical-grade, with composition Cr 16–18%, Ni 10–14%, Mo 2–3%) — the standard mid-range Swiss spec; not 904L (Rolex Oystersteel | Fully in-house manufacture at Kenissi (Le Locle). 26mm × 4.99mm, 27 jewels, free-sprung balance with variable inertia regulation |
| Sapphire crystal | Synthetic corundum (Al₂O₃) grown via the Verneuil process, Mohs hardness 9. Anti-reflective coating on the interior surface only (single-side AR is st Mohs 9 | Si hairspring providing antimagnetic protection and superior isochronism |
| Lume specification | Super-LumiNova grade BGW9 (blue-green daylight tone, blue emission in some variants) or C3 (yellow-green) depending on dial colour family. Glow durati | Synthetic corundum (Al₂O₃) grown via Verneuil process, anti-reflective coating on inner surface Mohs 9 |
| Bracelet alloy | Stainless steel 316L matching the case. | Anodized aluminum insert with engraved 60-minute dive scale — deliberately not ceramic |
| 316L Stainless Steel | — | Medical-grade 316L (Cr 16–18%, Ni 10–14%, Mo 2–3%). Satin-brushed tops, polished bevels |
Cost of Ownership Compared
The Tissot PRX Powermatic 80 saves you $3,167 over 5 years of ownership
Who Should Pick Which
Pick the Tissot PRX Powermatic 80 if…
- Strong value proposition under $1,000 with automatic Swiss movement
- Active lifestyle wearers — 100m water resistance handles swimming and water sports
- Weekend warriors — 80-hour power reserve means it survives two days off the wrist
- Those who prioritize scratch resistance — sapphire crystal
- Integrated-bracelet aesthetic fans wanting the Royal Oak look for 1/20th the price
Pick the Tudor Black Bay 58 if…
- True in-house COSC-certified manufacture movement at sub-$4,000
- 39mm "perfect proportions" — fits virtually any wrist from 6" to 8"
- Heritage collectors — direct lineage to the 1958 Tudor Submariner Reference 7924
- Wilsdorf Foundation (Rolex sister) pedigree without the waitlist or pricing
- 10-year service interval — longest in Swiss watchmaking, an explicit confidence statement
Tissot PRX Powermatic 80
- Retail markup is generous. The PRX commonly transacts at 30–40% under retail on Jomashop, Tissot's own e-commerce promotions, and authorized online dealers. Paying full $725 retail is rarely the right move — it usually means immediate ~30% loss the moment you walk out the door.
- Proprietary endlink limits strap options. The integrated bracelet design means you cannot easily put a NATO, leather two-piece, or rubber strap on the PRX without specialist hardware. This bothers some buyers more than they expect.
- Bracelet sizing is fiddly. Links are joined by screws (good — adjustable at home with a tool), but the screws are tiny and stripping them is common for inexperienced owners. Take it to a watchmaker for sizing if you're unsure.
- 3 Hz "slow" seconds. The reduced frequency (21,600 vph vs. 28,800 vph in some peer movements) means the seconds hand visibly sweeps at 6 ticks/second rather than 8. Some buyers expecting the smoother high-beat sweep find this a minor disappointment.
Tudor Black Bay 58
- No date complication — a feature for purists, but a limitation for daily-wearer buyers who want at-a-glance date
- 316L not 904L — Tudor uses standard steel, not Rolex's "Oystersteel" (practically irrelevant for the wearer)
- Aluminum bezel insert scratches more easily than ceramic — heritage-correct, but less daily-wear robust
- Bracelet endlinks are proprietary — limits aftermarket bracelet options (straps still work via drilled lug holes)
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 ~$850, it delivers Automatic Powermatic 80.111 with 80 Hours power reserve.
Check Price on AmazonTudor
Black Bay 58
Choose the Tudor Black Bay 58 if you value In-House Automatic Manufacture (Kenissi) technology, Swiss Made heritage, and 39mm proportions. At ~$4,480, the Automatic Manufacture Calibre MT5402 with 70 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Tissot PRX Powermatic 80 and Tudor Black Bay 58 represent two distinct approaches to fine watchmaking — the Tissot bringing Swiss Made tradition while Tudor delivers Swiss Made engineering.