Seiko Prospex 1968 Diver Modern Re-Interpretation GMT
SPB381
- Case
- 42mm
- MSRP
- $1,500
- Movement
- Automatic
- Reserve
- 72h
VS
Building 1v1 comparison
Building 1v1 comparison
1v1 Watch Comparison
A focused side-by-side page for specs, fit, movement details, review notes, and enthusiast context.
SPB381
M79680-0001
Pair Review
Built from the saved specs and wearability notes for these two watches, then weighed against enthusiast priorities like fit, movement quality, practicality, finishing, value, and collector appeal.
Where it wins
Best for buyers who want GMT functionality, 200m water resistance, and serious travel usefulness.
Where it wins
Best for buyers who want a refined everyday luxury watch with strong bracelet comfort and a polished, versatile presence.
The Tudor uses the in-house automatic MT5601, with COSC certification and a 70-hour power reserve, which gives it a strong technical profile and extra confidence in regulated performance. The Seiko uses the automatic 6R54, also with an excellent 72-hour power reserve and GMT functionality, but no listed certification or accuracy claim. On paper, the Seiko wins on complication and slightly longer reserve, while the Tudor wins on certification and the more premium movement narrative. Long-term reliability and serviceability are not fully detailed for either watch in the provided data, so they cannot be ranked beyond the listed specs. Winner: Tudor Black Bay 41
The Tudor is 41mm wide and 12.2mm thick, but the lug-to-lug and weight are not yet listed. Its wearability note says it feels like a substantial watch and wears noticeably larger than the Black Bay 39, though the bracelet articulation and T-fit clasp make it exceptionally comfortable. The Seiko is 42mm wide, 12.9mm thick, and has a 48.6mm lug-to-lug with a 20mm bracelet width; that shorter lug-to-lug helps it sound more compact in real wear despite the larger diameter. Its wearability note says it wears more comfortably than many competing GMT divers thanks to the compact length, restrained thickness, and slim-profile bracelet. For smaller wrists, the Tudor may feel more manageable in diameter but still sizable, while the Seiko’s shorter lug-to-lug should help it sit well despite its larger case. For medium-to-larger wrists, both should work, with the Tudor feeling more refined and the Seiko more purposeful and sporty. Winner: Tie
The Tudor’s anthracite dial and flat sapphire crystal suggest a clean, versatile look, and the polished bezel gives it a more elegant everyday personality; however, the dial legibility, lume type, and bracelet details are not yet listed beyond the T-fit clasp and steel bracelet. It has 100m water resistance, which is solid for daily life but less specialized for diving. The Seiko brings a green dial, LumiBrite markers, AR sapphire crystal, ceramic bezel, date, GMT hand, and 200m water resistance, making it the more functionally complete daily sports watch. Its bracelet tapers from 20mm to 18mm and includes a security-lock clasp, which supports practical wear, though the clasp is described as more utilitarian than premium in the wearability note. For travel, the GMT function clearly favors the Seiko; for more understated office-to-weekend versatility, the Tudor is easier to dress up. Winner: Seiko Prospex 1968 Diver Modern Re-Interpretation GMT SPB381
The Tudor carries a much higher listed MSRP at USD 4,825 versus USD 1,500 for the Seiko, so the Seiko is the clearer value by price alone. The Tudor does have stronger heritage signals in the data through the Black Bay line, in-house COSC-certified movement, and the overall premium execution described in the wearability notes. The Seiko brings authentic Prospex dive heritage, a GMT complication, 200m water resistance, and a very compelling ownership proposition for buyers who want functionality without Swiss luxury pricing. Durability expectations favor both in general terms based on their listed materials and screw-down crowns, but the Seiko’s hard coating and dive-oriented spec set add practical confidence. For collector appeal, the Tudor likely has the stronger luxury-brand gravity, while the Seiko has the more accessible enthusiast appeal. Winner: Seiko Prospex 1968 Diver Modern Re-Interpretation GMT SPB381
Compared
SPB381
M79680-0001