Side by side

Spinnaker Croft Mid-Size SkeletonvsTimefactors Speedbird PRS-51

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

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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.

Timefactors Speedbird PRS-51

Owners widely praise the Timefactors Speedbird PRS-51 for its flieger design, AR sapphire crystal, and value at £200. The 36mm case is noted to wear closer to 37mm due to the dial size, and while one owner describes the 5-link bracelet as well-built but stiff, another praises its drape and articulation. Accuracy figures vary among owners, with one reporting +7 seconds per day and another around +10 seconds per day, though one owner states theirs keeps impeccable time. The Miyota 9015 movement is noted by one owner to exhibit noticeable rotor wobble. Overall, owners rate the Timefactors Speedbird PRS-51 highly for its pilot watch aesthetics and value.

At a glance

11 of 29 specs differ
Diameter
Croft Mid-Size Skeleton40mm
Speedbird PRS-5136mm
Power Reserve
Croft Mid-Size Skeleton
Speedbird PRS-51
Water Resistance
Croft Mid-Size Skeleton100m
Speedbird PRS-51100m
MSRP
Croft Mid-Size Skeleton$425
Speedbird PRS-51$436

Full specifications

Case

6 specs
Category
Field
Diameter
40mm
36mm
Thickness
14mm
11.4mm
Lug-to-Lug
47mm
42mm
Lug Width
20mm
18mm
Material
316L Stainless Steel
Stainless Steel

Crystal & Dial

2 specs
Dial Color
Dollar Diver
Black
Lume
None
SuperLuminova X1-C3

Movement

2 specs
Caliber
Seiko NH38
Miyota 9015
Power Reserve
0h

Pricing

1 specs
MSRP
$425
$436
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