Longines HYDROCONQUESTvsSpinnaker Spence 300
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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.

HYDROCONQUEST

Spence 300
Diameter
42mm
40mm
Lug-to-Lug
51.2mm
48mm
lowest
Thickness
11.7mm
11.5mm
lowest
Water Resistance
300m
300m
Power Reserve
72h
n/a
MSRP
$2,200
$650
lowest
Movement
Longines L888
Seiko NH35
Case
5 specsCrystal & Dial
3 specsMovement
4 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Longines HYDROCONQUEST for its excellent value and finishing, often comparing it favorably to higher-end watches, with many appreciating the vibrant dial colors and the reliable movement. The slide-lock bracelet extension is noted as a particularly well-executed and useful feature. However, opinions on the bezel are mixed; some owners report confident action with no play, while others describe it as scratchy, difficult to turn, and exhibiting play or springiness. The Longines HYDROCONQUEST is considered a strong entry-level Swiss diver offering significant value for money.
Owners widely praise the Spinnaker Spence 300 for its slim 10.9mm case and 40mm diameter, offering a comfortable and versatile wear. Reviewers and owners alike highlight its value, with some seeing it as a budget alternative to more expensive dive watches. The watch features a Seiko NH35 automatic movement and 300m water resistance. However, some community members find the dial printing and bracelet finishing to be less refined, and a few suggest other brands offer better value at similar price points. On balance, owners and reviewers rate the Spinnaker Spence 300 highly for its impressive case dimensions and overall value proposition.
The watch's thin 10.9mm profile for a 300m diver is a key strength. No shared weakness was identified.
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