Jack Mason Ellum Manual WindvsSeiko King Seiko KSK

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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.

Jack Mason Ellum Manual Wind at true scale

Ellum Manual Wind

Seiko King Seiko KSK at true scale

King Seiko KSK

Diameter

38mm

38.6mm

Lug-to-Lug

45mm

lowest

45.8mm

Thickness

9mm

lowest

10.7mm

Water Resistance

50m

50m

Power Reserve

42h

45h

highest

MSRP

$799

lowest

$3,300

Movement

Sellita SW210-1

Seiko 6L35

Case

4 specs
Diameter
38mm
38.6mm
Thickness
9mm
10.7mm
Lug-to-Lug
45mm
45.8mm
Lug Width
20mm
19mm

Crystal & Dial

3 specs
Crystal Shape
n/a
Box
AR Coating
n/a
Anti-reflective coating on inner surface
Dial Color
n/a
n/a

Movement

4 specs
Caliber
Sellita SW210-1
Seiko 6L35
Type
Manual
Automatic
Power Reserve
42h
45h
Jewels
0
26

Pricing

1 specs
MSRP
$799
$3,300
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Reviews

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

Jack Mason Ellum Manual Wind

The Jack Mason Ellum Manual Wind is widely praised for its elegant, contemporary dress watch design, featuring a unique linen-textured dial and slim 38mm case. Owners and reviewers consistently highlight the dial's beauty and the watch's refined aesthetic, with some noting its mid-century inspiration. The Sellita SW210-1 manual-wind movement is regulated to ±5 seconds per day, and the watch is available for $799 to $949. Some owners find the date window detracts from the dial's design, and one reviewer notes the red, white, and blue seconds hand as a potentially distracting accent. On balance, owners and reviewers rate the Jack Mason Ellum Manual Wind highly for its beautiful dial and slim case at the price.

Seiko King Seiko KSK

The Seiko King Seiko KSK is praised for its slim, retro design with sharply faceted lugs and well-executed dials, featuring a mix of brushed and polished finishes. Owners and reviewers consistently highlight the Grand Seiko-level dial and case finishing, the double-bevel sapphire crystal, and an unusually nice bracelet. Accuracy figures vary, with one owner reporting +5 to +7 seconds per day and another noting +15/-10 seconds per day for the 6L35 movement. Some owners question the value proposition at its price point, particularly when considering the movement. Overall, owners and reviewers appreciate the King Seiko KSK for its refined retro aesthetic and high-quality finishing, despite some reservations about its price and movement in certain configurations.