Side by side

Spinnaker Hass AutomaticvsTimefactors 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 Hass Automatic

The Spinnaker Hass Automatic is a 43mm watch featuring an NH35 movement and sapphire crystal, with owners highlighting its beautiful dial. Some find Spinnaker watches, including this model, to be on the thicker side, with one owner describing the Hass X MCS Blue Fade variant as comically large and chunky. The Spinnaker Hass Automatic was offered at $445 USD as part of a special collection with customized elements, and a limited edition of 200 pieces was also available for $195 shipped. On balance, owners and reviewers note the attractive dial as a key positive, though some express reservations about the watch's thickness.

From video reviewers

The dial's recovered marine plastic construction with textured finish provides distinctive material differentiation at the entry-level dive watch price point, and the sapphire crystal with anti-reflective coating ensures strong on-wrist legibility. The 300m water resistance and automatic movement deliver capable specifications, though bracelet quality and fit remain underspecified across reviews.

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
Hass Automatic43mm
Speedbird PRS-5136mm
Power Reserve
Hass Automatic
Speedbird PRS-51
Water Resistance
Hass Automatic300m
Speedbird PRS-51100m
MSRP
Hass Automatic$445
Speedbird PRS-51$436

Full specifications

Case

7 specs
Category
Diver
Diameter
43mm
36mm
Thickness
16.5mm
11.4mm
Lug-to-Lug
50mm
42mm
Lug Width
22mm
18mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
300m
100m

Crystal & Dial

2 specs
Dial Color
Flying Dutchman
Black
Lume
None
SuperLuminova X1-C3

Movement

2 specs
Caliber
Seiko NH35
Miyota 9015
Power Reserve
0h

Pricing

1 specs
MSRP
$445
$436
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