Side by side

Seestern Sub 300 V4vsYema Superman Titanium Tourbillon CMM.31 Limited Edition

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

Sub 300 V4
SeesternSub 300 V4
MSRP $10
Superman Titanium Tourbillon CMM.31 Limited Edition
YemaSuperman Titanium Tourbillon CMM.31 Limited Edition
MSRP $13,000

At a glance

18 of 29 specs differ
Diameter
Sub 300 V442mm
Superman Titanium Tourbillon CMM.31 Limited Edition43mm
Power Reserve
Sub 300 V441h
Superman Titanium Tourbillon CMM.31 Limited Edition40h
Water Resistance
Sub 300 V4200m
Superman Titanium Tourbillon CMM.31 Limited Edition300m
MSRP
Sub 300 V4$10
Superman Titanium Tourbillon CMM.31 Limited Edition$13,000

Full specifications

Case

8 specs
Diameter
42mm
43mm
Thickness
13mm
11.7mm
Lug-to-Lug
46mm
Lug Width
20mm
22mm
Material
316L Stainless Steel
Titanium
Finish
Brushed + Sandblasted
Brushed and polished
Water Resistance
200m
300m
Caseback
Solid screw-down
Solid

Crystal & Dial

4 specs
Crystal
Sapphire
Domed Sapphire
AR Coating
Underside
Inner
Dial Color
Orange
Titanium
Lume
Japan Lume (blue glow)
None

Movement

5 specs
Caliber
Seiko NH35A
Yema CMM.31 Tourbillon
Beat Rate
21,600 vph
28,800 vph
Power Reserve
41h
40h
Jewels
24
25
Complications
GMT, Date
None

Pricing

1 specs
MSRP
$10
$13,000

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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.

Seestern Sub 300 V4

Owners widely praise the Seestern Sub 300 V4 for its terrific fit and finish and surprising little touches at its $179 price, noting top-notch case, dial, bezel, and crystal. The bracelet is considered nice enough for the price point, and the watch is powered by the solid and reliable Seiko NH35 movement. Some owners report that the polished sides of the case show signs of wear. Overall, owners rate the Seestern Sub 300 V4 highly for its excellent case, dial, and bezel finishing at the price.

Yema Superman Titanium Tourbillon CMM.31 Limited Edition

The Yema Superman Titanium Tourbillon CMM.31 Limited Edition is noted for its in-house titanium tourbillon movement offering a 105-hour power reserve and 200m water resistance, alongside a unique asphalt-grained dial. Owners find the 43mm size wearable, with one describing it as a contradictory "toolwatch" with exceptional movement craftsmanship. A reviewer flags the bracelet clasp's extension system as crude. On balance, owners and reviewers highlight the impressive movement and dial as key strengths of the Yema Superman Titanium Tourbillon CMM.31 Limited Edition.

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