Side by side

Sugess Seestern Heritage S436-2 BB GMTvsSeiko 5 Sports Field series

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

Seestern Heritage S436-2 BB GMT
SugessSeestern Heritage S436-2 BB GMT
MSRP $299
5 Sports Field series
Seiko5 Sports Field series
MSRP $450

At a glance

13 of 29 specs differ
Diameter
Seestern Heritage S436-2 BB GMT40mm
5 Sports Field series39.4mm
Power Reserve
Seestern Heritage S436-2 BB GMT35h
5 Sports Field series41h
Water Resistance
Seestern Heritage S436-2 BB GMT10m
5 Sports Field series100m
MSRP
Seestern Heritage S436-2 BB GMT$299
5 Sports Field series$450

Full specifications

Case

4 specs
Diameter
40mm
39.4mm
Thickness
12.2mm
13.6mm
Lug-to-Lug
48mm
47.9mm
Water Resistance
10m
100m

Crystal & Dial

3 specs
Crystal
Sapphire
Hardlex
Crystal Shape
Flat
Curved
Lume
Tritium
LumiBrite on hands and index(es)

Movement

5 specs
Caliber
Seiko NH34
4R34
Beat Rate
3 vph
28,800 vph
Power Reserve
35h
41h
Jewels
25
24
Complications
GMT, Moonphase, Date
None

Pricing

1 specs
MSRP
$299
$450

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What people say

Owners + reviewers, side by side

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

Sugess Seestern Heritage S436-2 BB GMT

Owners widely praise the Sugess Seestern Heritage S436-2 BB GMT for its 39mm sizing, 12mm thinness, and light yet solid feel, with many appreciating its legibility due to the matte dial, clear crystal, and strong lume, though one owner flags the lume as a weak point. The case finishing is considered excellent, and the blue dial and satin finish are favorably compared to alternatives. Some owners report issues with a loose bezel, with others finding it improved after tuning, and one owner notes the seconds hand is too short. The bracelet clasp lacks sufficient micro-adjustment and screw pins are difficult to remove. On balance, owners rate the Sugess Seestern Heritage S436-2 BB GMT highly for its comfortable wearability and attractive finishing at the price.

Seiko 5 Sports Field series

The Seiko 5 Sports Field series offers an accessible explorer-style watch with a 41mm stainless steel case, 100m water resistance, and a Hardlex crystal. The Field GMT model features a caller GMT complication powered by the 4R34 movement, while the standard Field models use the 4R36 with a 41-hour power reserve. Both models include Arabic numerals coated in LumiBrite and a lumed pearl on the bezel. On balance, the Seiko 5 Sports Field GMT is a well-regarded entry-level explorer watch for its price point, despite its office-style GMT function.

From video reviewers

The prominent five-sided GMT hand enhances legibility and adds a sophisticated aesthetic to the watch. The Seiko 5 Sports Field series offers similar functionality to the Explorer 2 at a lower price, making it a valuable option. Reviewers disagree on whether it's a missed opportunity for Seiko to release this model first, with one reviewer implying it would have been a more logical addition to their lineup.

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