Seiko 5KXvsSTEELDIVE SD1964GMT

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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.

Seiko 5KX at true scale

5KX

STEELDIVE SD1964GMT at true scale

SD1964GMT

Diameter

42.5mm

45.4mm

Lug-to-Lug

46mm

lowest

54.9mm

Thickness

13.4mm

lowest

17.1mm

Water Resistance

100m

1000m

highest

Power Reserve

41h

n/a

MSRP

$350

$248

lowest

Movement

Seiko 4R36

Seiko NH34

Case

5 specs
Diameter
42.5mm
45.4mm
Thickness
13.4mm
17.1mm
Lug-to-Lug
46mm
54.85mm
Material
Stainless Steel
Ceramic
Water Resistance
100m
1000m

Crystal & Dial

3 specs
Crystal
Hardlex
Sapphire
Dial Color
Blue
n/a
Lume
LumiBrite on hands and index(es)
None

Movement

3 specs
Caliber
Seiko 4R36
Seiko NH34
Power Reserve
41h
0h
Jewels
24
0

Pricing

1 specs
MSRP
$350
$248
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Reviews

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

Seiko 5KX

Owners widely praise the Seiko 5KX for its strong lume and value, with many reporting accuracy within +/-5 to 10 seconds per day, though some experience +/-1 second. The 42.5mm case is noted to wear smaller, and the watch offers a comfortable feel for many. Some owners are split on the bracelet quality, with opinions ranging from "cheaper side" with hollow links to "flimsy-feeling" jubilee. A few quality control issues have been reported, including a failed bezel clickspring and misaligned components. The Seiko 5KX is seen by some as a worthy successor to the original SKX, offering an upgraded movement with hacking and hand-winding capabilities, though others lament the loss of ISO certification and a screw-down crown. Overall, owners rate the Seiko 5KX highly for its excellent lume and value proposition, making it a popular choice for everyday wear.

STEELDIVE SD1964GMT

Owners widely praise the STEELDIVE SD1964GMT for its robust build quality, with one owner describing it as a "big brick crap house of a watch" and another noting it is built like a tank. The steel bracelet is considered a significant improvement over the original rubber strap, enhancing both aesthetics and wearability. Reviewers highlight excellent lume and a compelling value proposition at its $180 price point. One owner notes the case design can present challenges for photography. Overall, owners rate the STEELDIVE SD1964GMT highly for its tank-like construction and excellent value.