Side by side

Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's WatchvsZelos GT

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

GT
ZelosGT
MSRP $499

At a glance

15 of 29 specs differ
Diameter
Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch39.5mm
GT42mm
Power Reserve
Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch45h
GT40h
Water Resistance
Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch200m
GT100m
MSRP
Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch$2,800
GT$499

Full specifications

Case

7 specs
Category
Diver
Chronograph
Diameter
39.5mm
42mm
Thickness
12.3mm
10.8mm
Lug-to-Lug
47.2mm
42mm
Lug Width
20mm
22mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
200m
100m

Crystal & Dial

4 specs
Crystal Shape
Box
Flat
AR Coating
Anti-reflective coating on inner surface
Inner
Dial Color
Black
SS - Azzurro
Lume
LumiBrite on hands, index(es) and bezel
None

Movement

3 specs
Caliber
6L37
Miyota 9133
Power Reserve
45h
40h
Jewels
26
25

Pricing

1 specs
MSRP
$2,800
$499

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Seiko Prospex Marinemaster Marinemaster 1965 Heritage Diver's Watch

The Seiko Prospex Marinemaster 1965 Heritage Diver's Watch is praised for its faithful re-creation of the 62MAS design, with reviewers noting improved wearability due to smaller case sizes (38mm to 40mm) and updated bracelets. Specific models feature a stainless steel case with super-hard coating, ceramic bezel, and a tool-free extension system on the bracelet. Accuracy figures vary, with one model rated at -5/+10 seconds per day and another at -10/+15 seconds per day, powered by movements like the Caliber 8L45 or 6L37 offering 72-hour or 46-hour power reserves respectively. Some reviewers point out drawbacks such as an unsigned winding crown, a lack of tool-free micro-adjust on the clasp for certain models, and a secondary GMT function on one variant. The price point, ranging from $2,800 to $3,600, is considered high by some, especially when compared to other Seiko or Grand Seiko offerings.

Zelos GT

The Zelos GT is lauded for its value and bold design, with owners highlighting the cool power reserve meter and superb 3-point micro-adjust bracelet. Some owners find the case and lugs could hug the wrist better, and the bracelet is noted as being quite long, requiring significant link removal for a 7.1-inch wrist. The dark green dial, while inspired by Lamborghini, is described as appearing mostly black. Overall, owners rate the Zelos GT highly for its value and the quality of its bracelet at the price point.

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