Which is better for swimming?

Both are rated to 100m, so either handles pool and snorkeling use. The SRPD51 adds a rotating bezel and stronger lume, which makes it the more natural swim and dive companion.

The PRX has the edge on durability thanks to its sapphire crystal, which resists scratches far better than the SRPD51's Hardlex. Both use proven automatic movements that hold up with regular servicing.

Is the Tissot worth stepping up to?

If you want sapphire, a longer 80-hour reserve and a slimmer dressier case, yes. If you need a bezel, day-date and a tougher everyday tool watch, the Seiko covers that better.

Which is better for daily wear?

The PRX's 40mm case and integrated bracelet slip under a shirt cuff and suit office wear. The SRPD51 is bulkier but shrugs off knocks and suits casual and outdoor days.

Yes. The PRX shows the date only; the SRPD51 adds the day of the week alongside the date.

Which has the better bracelet?

The PRX's integrated bracelet with quick-release links and a butterfly clasp is more refined. The Seiko's bracelet is solid and functional but less finely finished.

Seiko 5 Sports SRPD51 vs Tissot PRX Powermatic 80

The Tissot PRX Powermatic 80 is the better watch for most people: sapphire crystal, an 80-hour Swiss movement and a slimmer 40mm case with an integrated bracelet. The Seiko 5 Sports SRPD51 wins on ruggedness and utility, with a rotating dive bezel, day-date, LumiBrite and a 100m rating that suits swimming. Reviewers praise the PRX for its finishing and bracelet; Seiko owners like the SRPD51 as a tough, easy-wearing everyday automatic.

Choose the Seiko 5 Sports SRPD51 if you want a dive-style beater with a rotating bezel, day-date and strong lume for swimming and rough daily wear.
Choose the Tissot PRX Powermatic 80 if you want a dressier everyday watch with sapphire crystal, a long 80-hour reserve and a slimmer integrated-bracelet look.

Prices

Seiko 5 Sports SRPD51: $280.00 at Time Square Clock Shop (last seen Nov 9)
Tissot PRX Powermatic 80: $234.00 at Vistora (last seen Nov 4)
Difference: the Tissot PRX Powermatic 80 is $46.00 cheaper than the Seiko 5 Sports SRPD51 at the latest prices (Nov 4 and Nov 9)

	Seiko 5 Sports SRPD51	Tissot PRX Powermatic 80
Crystal	Hardlex mineral	Sapphire with antireflective coating
Power reserve	About 41 hours	Up to 80 hours
Case size and thickness	42.5mm wide, 13.4mm thick, 46mm lug-to-lug	40mm wide, slimmer profile
Bezel	Unidirectional rotating dive bezel	Fixed smooth bezel
Calendar	Day and date	Date only
Lume	LumiBrite hands and markers	Super-LumiNova on hands and indexes
Bracelet	Stainless steel with deployment clasp	Integrated quick-release bracelet with butterfly clasp
Water resistance	10 bar (100m)	10 ATM (100m)

Spec	Seiko 5 Sports SRPD51	Tissot PRX Powermatic 80
Movement Type	Automatic with manual winding	Automatic
Case Material	Stainless steel	Stainless Steel
Water Resistance	10 bar	100 m (10 ATM)
Movement	Seiko 24-Jewel Automatic (self-winding and hand…	Automatic
Calibre Number	4R36	—
Power Reserve	Approx. 41 hours	—
Jewels	24	—
Case Thickness	13.4mm	—
Case Diameter	42.5mm	—
Lug-to-lug	46.0mm	—
Crystal	Hardlex	—
Distance between lugs	22	—

Spec	Seiko 5 Sports SRPD51	Tissot PRX Powermatic 80
Weight	170.0	—
Case	Stainless Steel	—
Case Lug to Lug	46mm	—
Case Back	Exhibition window, screw-in back	—
Band	Stainless steel bracelet, deployant clasp.	—
Band Width	22mm	—
Warranty	2 Years	—
Water Resistant	—	Yes
Watch Movement	—	Mechanical
Mechanical Movement

Seiko 5 Sports SRPD51 vs Tissot PRX Powermatic 80

Prices

Seiko 5 Sports SRPD51 vs Tissot PRX Powermatic 80

Prices

Tissot PRX Powermatic 80

What separates them

Price history

Prices at every store