lug2lug
BrowseCompareNewsCommunityMy Watches
BrowseCompareNewsCommunityMy Watches
Theme
Popular microbrands:Christopher Ward·Baltic·anOrdain·Atelier Wen·Boldr·Bremont·Dan Henry·DOXABrowse all →
Best, by the specs:Diver under $2,000·Dress under $5,000·Chronograph under $5,000·Best sport watches·GMT under $5,000·Field under $500·Pilot under $2,000·Casual under $1,000All rankings →
Glossary:Lug-to-Lug·Water Resistance·Chronograph·GMT·Automatic·LumeBrowse all →
Tools:Collection tracker·Watch size chart·Wrist-fit calculator·Selling calculator·What should I buy?·Market index·iPhone app
Lug2Letter
Watches worth knowing about, weekly.
Curated discoveries, founder spotlights, and the occasional deep-dive.
Get the app
Download on theApp StoreGET IT ONGoogle Play
TermsPrivacyDelete accountCopyrightDisclosuresContactContribute

Independent reference site · not affiliated with any brand · contains affiliate links

© 2026 Lug2Lug LLC · Prices are estimates and not offers

Loading watch
Home/Browse/Seestern/MoonPhase Master Automatic S437-2.SW
SpecStudio
Seestern MoonPhase Master Automatic S437-2.SW
Click to inspect
Seestern · MoonPhase Master

Seestern MoonPhase Master Automatic S437-2.SW

Moonphase

$200In stock
Buy from SeesternFind used on eBay

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

Case

Diameter
41mm
Thickness
13mm
Material
Stainless Steel
Water resistance
50m

Crystal & dial

Crystal
Sapphire

Movement

Caliber
Seagull ST2528
Type
Automatic

Seagull

Seagull's complicated automatic caliber featuring moonphase and day-date displays in a single movement. At 6.8mm thick it accommodates the additional moonphase disc mechanism atop the base automatic platform. The 27-jewel count reflects the added complexity, and the moonphase display adds a touch of haute horlogerie to watches priced in the budget segment. Represents the most complicated mass-produced Seagull movement currently available.

Design language

Case shape
round
Dial style
standard
Bezel
smooth_polished
Bracelet
leather_strap
Moonphase
Yes

AI-detected from the product image

MoonPhase Master collection · 9 watches

MoonPhase Master Automatic S395.01 .S
MoonPhase Master Automatic S395.01 .S41mm
MoonPhase Master Automatic S401C.E
MoonPhase Master Automatic S401C.E41mm
MoonPhase Master Automatic S437-2
MoonPhase Master Automatic S437-241mm
MoonPhase Master Automatic S437.05
MoonPhase Master Automatic S437.0541mm
MoonPhase Master Automatic SU2153SW.S
MoonPhase Master Automatic SU2153SW.S40mm
MoonPhase Master Automatic SU2528GW
MoonPhase Master Automatic SU2528GW41mm
MoonPhase Master Automatic SU2528STRA V3
MoonPhase Master Automatic SU2528STRA V341mm
MoonPhase Master Automatic SU2528STRB V3
MoonPhase Master Automatic SU2528STRB V341mm
Alternatives

Market

Retail$200

No forum listings recorded for this watch yet.

Similar watches

Seagull Artisan Heritage Series Multifunction Celestial Calendar Power Reserve Indicator Eccentric Tourbillon 41mm

Seagull

Artisan Heritage Series Multifunction Celestial Calendar Power Reserve Indicator Eccentric Tourbillon 41mm

41mm · Automatic$3,549

Seagull Extraordinary Series Moon Phase Dress Watch 40mm

Seagull

Extraordinary Series Moon Phase Dress Watch 40mm

40mm · Automatic$609

Seagull Moon Phase Dress Watch 41mm

Seagull

Moon Phase Dress Watch 41mm

41mm · Automatic$429

Mühle-Glashütte Teutonia IV Moonphase

Mühle-Glashütte

Teutonia IV Moonphase

41mm · Automatic$2,966

Baume & Mercier Clifton Moon Phase

Baume & Mercier

Clifton Moon Phase

39mm · Automatic

Pequignet Royale Origine

Pequignet

Royale Origine

42mm · Automatic$9,450

View all alternatives

Community

“

Owners widely praise the Seestern MoonPhase Master Automatic S437-2.SW for its exceptional BGW9 lume, described as a "torch" with a fully lumed bezel insert. The bezel action is noted as clicky and tactile with zero backplay, and the V2 bracelet's upgraded end-links and secure clasp are well-received. One owner found the watch amazing, though they opted to replace the stock strap. Overall, owners rate the Seestern MoonPhase Master Automatic S437-2.SW highly for its impressive lume and well-executed bracelet and bezel.

Synthesized from 2 sources
Reddit·2↗
Open the discussion

On real wrists

No shots yet. Show how it wears.

Related

Ask the communityStart a discussion about the MoonPhase Master Automatic S437-2.SW: get takes from other collectors.Ask →

Discussion