Alsta NautoscaphvsLongines HydroConquest GMT

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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.

Alsta Nautoscaph at true scale

Nautoscaph

Longines HydroConquest GMT at true scale

HydroConquest GMT

Diameter

40mm

41mm

Lug-to-Lug

51.3mm

49.4mm

lowest

Thickness

16.2mm

12.9mm

lowest

Water Resistance

300m

300m

Power Reserve

41h

n/a

MSRP

$695

lowest

$3,350

Movement

Seiko NH35

L844.5

Case

5 specs
Diameter
40mm
41mm
Thickness
16.2mm
12.9mm
Lug-to-Lug
51.3mm
49.4mm
Lug Width
n/a
21mm
Material
Bronze
Stainless Steel

Crystal & Dial

1 specs
Dial Color
n/a
Green

Movement

2 specs
Caliber
Seiko NH35
L844.5
Power Reserve
41h
0h

Pricing

1 specs
MSRP
$695
$3,350
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Reviews

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

Alsta Nautoscaph

Owners widely praise the Alsta Nautoscaph for its vintage-inspired design, cinematic appearances in films like "Jaws" and "Fear and Loathing in Las Vegas," and its "70s cool" aesthetic. Reviewers note its contrasting case finishes and functional, lumed dial, though the absence of a lumed numeral at 3 o'clock due to the date window is a minor drawback. One reviewer flags the watch's 15.1mm thickness and poor bracelet execution as significant issues, deeming it a "colossal failure" at its price point, while another owner suggests it is egregiously overpriced at MSRP but a fun summer piece in the $500-600 range. On balance, owners and reviewers are divided on the Alsta Nautoscaph's value and wearability, with its aesthetic appeal and cinematic provenance being its strongest selling points.

Longines HydroConquest GMT

Owners widely praise the Longines HYDROCONQUEST GMT for its excellent finishing, robust build quality, and comfortable wearability, with some finding its finish superior to higher-priced competitors. The smooth winding action and value proposition are also frequently highlighted. Some owners note that the GMT hour markers are difficult to read, and the date wheel does not always match the dial color. A few reviewers mention a sharp folding clasp and a bezel with bounce-back, while others prefer a smaller case size. Overall, owners and reviewers rate the Longines HYDROCONQUEST GMT highly for its impressive build quality and value as a travel-oriented dive watch.