Side by side

Spinnaker Hull DivervsTimefactors 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 Hull Diver

The Spinnaker Hull Diver is widely praised for its excellent build quality, featuring a milled clasp, solid links, and a strong anti-reflective coating on its sapphire crystal. Owners highlight its value, with one calling it one of their best affordable watches at $170, and appreciate the dual-part case construction that contributes to a reduced thickness. The blue dial is noted for its attractive play of light, and the screw-down crown is easy to operate. However, the lume is considered average, and some desire a higher beat movement. On balance, owners rate the Spinnaker Hull Diver highly for its robust construction and strong value proposition at its price point.

From video reviewers

The cushion case design and solid construction are praised. The bracelet is noted as solid stainless steel.

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

12 of 29 specs differ
Diameter
Hull Diver42mm
Speedbird PRS-5136mm
Power Reserve
Hull Diver
Speedbird PRS-51
Water Resistance
Hull Diver300m
Speedbird PRS-51100m
MSRP
Hull Diver$375
Speedbird PRS-51$436

Full specifications

Case

7 specs
Category
Diver
Diameter
42mm
36mm
Thickness
15mm
11.4mm
Lug-to-Lug
47.5mm
42mm
Lug Width
22mm
18mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
300m
100m

Crystal & Dial

2 specs
Dial Color
Green
Black
Lume
None
SuperLuminova X1-C3

Movement

2 specs
Caliber
Seiko NH35
Miyota 9015
Power Reserve
0h

Pricing

1 specs
MSRP
$375
$436
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