Side by side

Serica Ref. 5303 Diving ChronometervsSugess Seestern S446 GMT

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Ref. 5303 Diving Chronometer
SericaRef. 5303 Diving Chronometer
MSRP $1,768
Seestern S446 GMT
SugessSeestern S446 GMT
MSRP $269

At a glance

14 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Seestern S446 GMT40mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Seestern S446 GMT41h
Water Resistance
Ref. 5303 Diving Chronometer300m
Seestern S446 GMT100m
MSRP
Ref. 5303 Diving Chronometer$1,768
Seestern S446 GMT$269

Full specifications

Case

6 specs
Category
Diver
GMT
Diameter
39mm
40mm
Thickness
12.2mm
10mm
Lug-to-Lug
46.5mm
47mm
Lug Width
20mm
19mm
Water Resistance
300m
100m

Crystal & Dial

3 specs
AR Coating
Yes
Inner
Dial Color
Enamel Black
Black
Lume
Super-LumiNova
Tritium

Movement

4 specs
Caliber
M100 COSC
Seiko NH34
Beat Rate
28,800 vph
3 vph
Power Reserve
42h
41h
Complications
COSC
GMT, Moonphase, Date

Pricing

1 specs
MSRP
$1,768
$269

Follow this matchup

Get a note when Serica Ref. 5303 Diving Chronometer vs Sugess Seestern S446 GMT gets more votes, a community discussion, or a price drop. No account needed.

What people say

Owners + reviewers, side by side

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

Serica Ref. 5303 Diving Chronometer

Owners widely praise the Serica Ref. 5303 Diving Chronometer for its excellent wearability, definitive style, and smooth, confident bezel action. The dual scale on the bezel is noted as surprisingly useful, and the crown action, winding, and hacking are reported to work perfectly. One owner describes the Serica 5303-3 as gorgeous and unique, though another notes the crown can appear comically large. On balance, owners rate the Serica Ref. 5303 Diving Chronometer highly for its blend of unique design and robust functionality.

Sugess Seestern S446 GMT

Owners widely praise the Sugess Seestern S446 GMT for its outstanding finishing and materials at its price point, with specific mentions of the cream or ivory dial, polished hands, and clear crystal offering superb legibility. Accuracy is generally good, with one owner reporting +2/3 seconds per day from the Seiko NH34A movement. Some owners find the lume is not a strong point, and the bracelet clasp could benefit from more micro-adjustment, with screw pins noted as cheap. The GMT hand is described as flat by some, and opinions are split on the "Sugess" versus "Seestern" logo. Overall, owners rate the Sugess Seestern S446 GMT highly for its beautiful dial and excellent build quality for the price.

Keep exploring

More watches worth a look

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

Adjacent matchups

People also compared

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