Seiko Prospex Marinemaster 1968 Heritage Diver's WatchvsMKII Stingray II

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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.

Seiko Prospex Marinemaster 1968 Heritage Diver's Watch at true scale

Prospex Marinemaster 1968 Heritage Diver's Watch

MKII Stingray II at true scale

Stingray II

Diameter

42.6mm

40mm

Lug-to-Lug

49.3mm

48.5mm

lowest

Thickness

14.1mm

lowest

14.7mm

Water Resistance

300m

highest

200m

Power Reserve

72h

highest

50h

MSRP

$3,600

n/a

Movement

Seiko 8L45

Seiko NE15

Case

4 specs
Diameter
42.6mm
40mm
Thickness
14.1mm
14.7mm
Lug-to-Lug
49.3mm
48.5mm
Water Resistance
300m
200m

Crystal & Dial

4 specs
Crystal Shape
Curved
n/a
AR Coating
Anti-reflective coating on inner surface
n/a
Dial Color
n/a
n/a
Lume
LumiBrite on hands, index(es) and bezel
Arclite Super LumiNova (green emission)

Movement

3 specs
Caliber
Seiko 8L45
Seiko NE15
Power Reserve
72h
50h
Jewels
35
0

Pricing

1 specs
MSRP
$3,600
n/a
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Reviews

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

Seiko Prospex Marinemaster 1968 Heritage Diver's Watch

Owners and reviewers widely praise the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch for its exceptional finishing, comparable to Grand Seiko, and refined design, with particular appreciation for its case shape and the 4:00 crown position. The watch is noted for its enjoyable look and feel, and some consider it a significant step up from standard Prospex models, offering premium finishing and a tool-like appearance. The movement Seiko 8L45 is mentioned, along with a 72-hour power reserve and an accuracy of -5/+10 seconds per day. However, some find the price point high, and one reviewer noted the unsigned winding crown as a missed opportunity for a watch in this price range. On balance, owners and reviewers rate the Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch highly for its exceptional finishing and refined design at its price point.

MKII Stingray II

The MKII Stingray II is widely praised for its utilitarian design, smooth bezel action, and excellent legibility with a matte dial and sword hands. Owners appreciate the wearable 40mm sandblasted case, though its 14.7mm thickness is noted as substantial for the size. Accuracy is a point of divergence, with one owner reporting degradation from +/- 15-30 seconds per day to -30-40 seconds per day, while another source does not specify accuracy. The 4:30 date window is a common point of contention among reviewers. Overall, owners and reviewers rate the MKII Stingray II highly for its robust design and legibility at the price.

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