Merkur MONOBLOCK TUNAvsSeiko King Turtle

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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.

Merkur MONOBLOCK TUNA at true scale

MONOBLOCK TUNA

Seiko King Turtle at true scale

King Turtle

Diameter

47mm

45mm

Lug-to-Lug

48mm

47.7mm

lowest

Thickness

17mm

13.2mm

lowest

Water Resistance

200m

200m

Power Reserve

40h

41h

highest

MSRP

$279

lowest

$650

Movement

Seiko NH35

Seiko 4R36

Case

4 specs
Diameter
47mm
45mm
Thickness
17mm
13.2mm
Lug-to-Lug
48mm
47.7mm
Lug Width
20mm
22mm

Crystal & Dial

2 specs
AR Coating
n/a
Anti-reflective coating on inner surface
Lume
None
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
Seiko NH35
Seiko 4R36
Power Reserve
40h
41h
Jewels
0
24

Pricing

1 specs
MSRP
$279
$650
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Reviews

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

Merkur MONOBLOCK TUNA

Merkur MONOBLOCK TUNA owners widely praise its excellent finishing, often noting it surpasses typical examples, and appreciate the tactile, satisfying 60-click bezel action on the titanium case. The watch is described as robust, handling snow exposure and submersion well, with reliable performance and accuracy around +2 to +3 seconds per day. Some owners highlight the monoblock case construction and sapphire bezel insert options, while others enjoy the beautiful color and killer styling on an oyster bracelet. The quality is considered surprisingly good for the price. On balance, owners rate the Merkur MONOBLOCK TUNA highly for its exceptional finishing and reliable performance at its price point.

Seiko King Turtle

Seiko King Turtle is widely praised for its excellent value and robust design, featuring the reliable 4R36 movement. Owners appreciate its superior lume and a bezel action described as smoother and more precise than some siblings. The 45mm cushion case, while substantial, wears smaller than expected due to its shape and short lug-to-lug distance. On balance, owners and reviewers rate the Seiko King Turtle highly for its proven design and overall value proposition.

From video reviewers

The King Turtle's ceramic bezel and sapphire crystal are significant upgrades. Reviewers noted a slight price increase for these features.

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