Synchron PoseidonvsZelos Spearfish 3

lug2lug doesn't sell watches. Buy links open the brand's or seller's own site. Some links are affiliate links: lug2lug may earn a commission at no extra cost to you. Disclosures

Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Synchron Poseidon at true scale

Poseidon

Zelos Spearfish 3 at true scale

Spearfish 3

Diameter

41mm

40mm

Lug-to-Lug

45mm

n/a

Thickness

11.9mm

11.5mm

lowest

Water Resistance

300m

highest

200m

Power Reserve

68h

n/a

MSRP

n/a

$799

Movement

La Joux-Perret G100

La Joux-Perret G100

Case

5 specs
Diameter
41mm
40mm
Thickness
11.9mm
11.5mm
Lug-to-Lug
45mm
n/a
Material
Titanium
316L Stainless Steel
Water Resistance
300m
200m

Crystal & Dial

1 specs
Dial Color
Sunshine Yellow
Diver - Forged Carbon

Movement

1 specs
Power Reserve
68h
0h

Pricing

1 specs
MSRP
n/a
$799
Keep your wishlist and collection together in the appExplore the app

Reviews

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

Synchron Poseidon

Owners widely praise the Synchron Poseidon for its vintage-inspired diver aesthetics, easy-to-read dial, and precise, grippy bezel. The La Joux-Perret G100 movement is consistently noted as a strong point, with owners reporting good timekeeping, one seeing accuracy around -4 seconds per day, and others highlighting its 68-hour power reserve. The winding action and crown operation are described as reassuring, with one reviewer stating it surpasses watches at double the price. Some find the design busy or the branding confusing, and the blasted finish on the steel bezel rim contrasts with the brushed case. One owner noted the included Isofrane strap can be long for smaller wrists. On balance, owners and reviewers rate the Synchron Poseidon highly for its robust build, reliable movement, and excellent value.

Zelos Spearfish 3

Owners widely praise the Zelos Spearfish 3 for its exceptional finishing, with razor-sharp transitions and polish that exceed expectations for its price point. The 40mm case is noted for its wearability, and the bracelet is considered superb, featuring a tool-less micro-adjustment clasp that is among the best from microbrands. Some owners also highlight the beautiful and unique dials as a significant draw. One owner found the titanium case too light, though later regretted selling it. The Zelos Spearfish 3 uses the La Joux-Perret G100 automatic movement. Overall, owners and reviewers rate the Zelos Spearfish 3 highly for its outstanding finishing and wearability at its price point.

From video reviewers

The La Joux Perret G100 movement is a significant strength. The bracelet's refinement is a weakness. Reviewers disagreed on the dial material, with one noting a burnt orange sunburst and another mentioning meteorite.

Similar watches

Matched to the watches above on size, movement, style and price, microbrands first. Open any one to dig in.

DiscussionNot started

Also compared

Comparisons nearby in the catalog: alternatives to the watches above paired against the matchup.