Santurce El Tiburón — Swiss Automatic DivervsSeiko Prospex Marinemaster 1965 Diver’s Modern Re-interpretation
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Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

El Tiburón — Swiss Automatic Diver

Prospex Marinemaster 1965 Diver’s Modern Re-interpretation
Diameter
39mm
39.5mm
Lug-to-Lug
46mm
lowest
47.2mm
Thickness
12.2mm
lowest
12.3mm
Water Resistance
300m
highest
200m
Power Reserve
n/a
45h
MSRP
$949
lowest
$2,800
Movement
Sellita SW200-1
Seiko 6L37
Case
4 specsCrystal & Dial
4 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The Santurce El Tiburón — Swiss Automatic Dive Watch features a 39mm sandblasted steel case and a flat sapphire crystal with no glare. Reviewers praise its smooth and secure bezel action, along with excellent and even luminous material application on the hands and markers. Overall, owners rate the Santurce El Tiburón — Swiss Automatic Dive Watch highly for its glare-free crystal and excellent lume application.
The Seiko Prospex Marinemaster Marinemaster 1965 Diver’s Modern Re-interpretation is noted for its slim 12.3mm case and 39.5mm diameter, making it a wearable dive watch. The automatic Seiko 6L37 movement is described as having a 45-46 hour power reserve, with one reviewer noting an accuracy of -10/+15 seconds per day. The watch features a box-shaped sapphire crystal and 200 meters of water resistance. However, its price of A$4,650 is considered high for its specifications, and one reviewer questions Seiko's continued reliance on the 62MAS design. On balance, reviewers find the Seiko Prospex Marinemaster Marinemaster 1965 Diver’s Modern Re-interpretation to be a functional and refined dive watch, though its value proposition is debated due to its price point.
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