Seiko Prospex SeavsYema Superman Titanium Tourbillon CMM.31 Limited Edition

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Seiko Prospex Sea

MSRP $1,500

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Buy from Seiko Used on eBay

Yema Superman Titanium Tourbillon CMM.31 Limited Edition

MSRP $13,000

See the full watch

Buy from Yema Used on eBay

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Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Prospex Sea

Superman Titanium Tourbillon CMM.31 Limited Edition

Diameter

Across the case, crown excluded.

43.5mm

43mm

Lug-to-Lug

The number that decides fit.

51mm

n/a

Thickness

How it sits under a cuff.

13.3mm

11.7mm

lowest

Water Resistance

Rated in meters.

200m

300m

highest

Power Reserve

How long it runs off the wrist.

70h

n/a

MSRP

Sticker price, new.

$1,500

lowest

$13,000

Movement

What drives the hands.

Seiko 6R35

Yema CMM.31 Tourbillon

Spec

Prospex Sea

Superman Titanium Tourbillon CMM.31 Limited Edition

Case

4 specs

Diameter

43.5mm

43mm

Thickness

13.3mm

11.7mm

Lug-to-Lug

51mm

n/a

Water Resistance

200m

300m

Crystal & Dial

4 specs

Crystal

Sapphire

Domed Sapphire

AR Coating

Anti-reflective coating on inner surface

n/a

Dial Color

n/a

Titanium

Lume

LumiBrite on hands and index(es)

None

Movement

3 specs

Caliber

Seiko 6R35

Yema CMM.31 Tourbillon

Power Reserve

70h

Jewels

Pricing

1 specs

MSRP

$1,500

$13,000

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Reviews

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

Seiko Prospex Sea

Owners praise the Seiko Prospex Sea for its value and classic design, with reviewers highlighting its impressive case finishing and excellent LumiBrite lume. One owner found the watch to be a great first proper timepiece, while another noted it felt uncomfortably large, thick, and heavy on a 6.5-inch wrist. The hard-coated steel case offers scratch resistance. On balance, owners and reviewers rate the Seiko Prospex Sea highly for its value and finishing.

A Blog to Watch·2

Yema Superman Titanium Tourbillon CMM.31 Limited Edition

The Yema Superman Titanium Tourbillon CMM.31 Limited Edition is lauded for its in-house titanium tourbillon movement, offering a 105-hour power reserve, and its distinctive asphalt-grained dial. Owners find the 43mm titanium case size to be well-proportioned and comfortable. Some reviewers note the bracelet clasp's extension system is crude, while others praise the overall craftsmanship as magnificent. Overall, owners and reviewers consider the Yema Superman Titanium Tourbillon CMM.31 Limited Edition a compelling dive watch due to its impressive movement and unique dial at its price point.

Time + Tide