Side by side

Sugess Seestern Heritage S436-2 BB GMTvsYema Skin Diver CMM.20

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
Skin Diver CMM.20
YemaSkin Diver CMM.20
MSRP $2,372

At a glance

13 of 29 specs differ
Diameter
Seestern Heritage S436-2 BB GMT40mm
Skin Diver CMM.2039.5mm
Power Reserve
Seestern Heritage S436-2 BB GMT35h
Skin Diver CMM.2040h
Water Resistance
Seestern Heritage S436-2 BB GMT10m
Skin Diver CMM.20200m
MSRP
Seestern Heritage S436-2 BB GMT$299
Skin Diver CMM.20$2,372

Full specifications

Case

6 specs
Category
GMT
Diver
Diameter
40mm
39.5mm
Thickness
12.2mm
11.5mm
Lug-to-Lug
48mm
47mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
10m
200m

Crystal & Dial

2 specs
Crystal
Sapphire
Domed Sapphire
Lume
Tritium
None

Movement

4 specs
Caliber
Seiko NH34
Yema CMM.20
Beat Rate
3 vph
28,800 vph
Power Reserve
35h
40h
Complications
GMT, Moonphase, Date
None

Pricing

1 specs
MSRP
$299
$2,372

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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.

Yema Skin Diver CMM.20

Owners and reviewers widely praise the Yema Skin Diver CMM.20 for its vintage aesthetic, 39mm-39.5mm case size, and the in-house CMM.20 micro-rotor movement. The watch features a textured cream dial, sharp applied indices, and a satisfyingly over-engineered push-to-turn bi-directional bezel. The fully brushed bracelet with toolless micro-adjust clasp is highlighted as a significant improvement, though some note its extended lug-to-lug may challenge smaller wrists. Accuracy figures range from -3/+7 seconds per day to erratic results between 0 and -10 seconds per day, with a 70-hour power reserve. Some owners express concerns about the brand's QC reputation and the micro-rotor movement's performance, while one reviewer noted questionable finishing on a prototype's hour hand and a rattly clasp. Overall, owners and reviewers rate the Yema Skin Diver CMM.20 highly for its vintage styling and improved bracelet at the price.

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