Glycine Airman SST GMT GL0309vsSeiko Prospex Marinemaster 1968 Heritage Diver's Watch

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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.

Glycine Airman SST GMT GL0309 at true scale

Airman SST GMT GL0309

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

Prospex Marinemaster 1968 Heritage Diver's Watch

Diameter

43mm

42.6mm

Lug-to-Lug

n/a

49.3mm

Thickness

n/a

14.1mm

Water Resistance

200m

300m

highest

Power Reserve

n/a

72h

MSRP

$905

lowest

$3,600

Movement

Sellita SW330-2

Seiko 8L45

Case

5 specs
Diameter
43mm
42.6mm
Thickness
n/a
14.1mm
Lug-to-Lug
n/a
49.3mm
Lug Width
n/a
20mm
Water Resistance
200m
300m

Crystal & Dial

4 specs
Crystal Shape
n/a
Curved
AR Coating
n/a
Anti-reflective coating on inner surface
Dial Color
n/a
n/a
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Sellita SW330-2
Seiko 8L45
Power Reserve
0h
72h
Jewels
0
35

Pricing

1 specs
MSRP
$905
$3,600
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Reviews

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

Glycine Airman SST GMT GL0309

The Glycine Men's Airman SST GMT 43mm Automatic Watch GL0309 is widely praised as an excellent value for a Swiss automatic GMT watch. Owners highlight its design, referencing the brand's hometown of Bienne, Switzerland, and its cool re-release from the 1970s. Its historical significance as an early dual time zone watch, predating the Rolex GMT Master and popular with Vietnam veterans and early astronauts, is also noted. One airline pilot considers the Glycine Airman SST GMT 43mm their daily wear and the best pilot watch ever made. The dial's two black shades represent AM and PM, with the hour hand at 6 o'clock signifying noon. Overall, owners rate the Glycine Men's Airman SST GMT 43mm Automatic Watch GL0309 highly for its historical significance and exceptional value as a pilot's watch.

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.

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