Side by side

Spinnaker Croft Mid-Size SkeletonvsSeiko Monster

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

Croft Mid-Size Skeleton
SpinnakerCroft Mid-Size Skeleton
MSRP $425
Monster
SeikoMonster
MSRP $550
What people say

Owners + reviewers, side by side

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

Spinnaker Croft Mid-Size Skeleton

The Spinnaker Croft Mid-Size Skeleton is noted for its 40mm steel case, sapphire crystal, and 150m water resistance. One owner reports strong performance from the TMI NH70 movement at -3 seconds per day, with very nice lume. On balance, owners find the Spinnaker Croft Mid-Size Skeleton to be a pretty nice option, particularly for its movement performance and lume.

Seiko Monster

Owners widely praise the Seiko Prospex Sea for its excellent value, robust build, and superb lume, with many noting its comfortable wearability. Reviewers consistently highlight its impressive finishing and classic dive watch design, often comparing it favorably to older models. Some owners find the size substantial, with one noting it as big, thick, and heavy on a 6.5-inch wrist, while others find it perfect. On balance, owners and reviewers rate the Seiko Prospex Sea highly for its exceptional value and robust, classic dive watch design.

At a glance

13 of 29 specs differ
Diameter
Croft Mid-Size Skeleton40mm
Monster42.4mm
Power Reserve
Croft Mid-Size Skeleton40h
Monster41h
Water Resistance
Croft Mid-Size Skeleton100m
Monster200m
MSRP
Croft Mid-Size Skeleton$425
Monster$550

Full specifications

Case

6 specs
Category
Field
Diver
Diameter
40mm
42.4mm
Thickness
14mm
13.4mm
Lug-to-Lug
47mm
49.4mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
100m
200m

Crystal & Dial

3 specs
Crystal
Sapphire
Hardlex
Dial Color
Dollar Diver
Black
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
SII NH38A
4R36
Power Reserve
40h
41h
Jewels
25
24

Pricing

1 specs
MSRP
$425
$550
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