Side by side

AVI-8 Spitfire Smith AutomaticvsTimefactors Speedbird PRS-51

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

What people say

Owners + reviewers, side by side

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

AVI-8 Spitfire Smith Automatic

Owners praise the AVI-8 Spitfire Smith Automatic for its dial depth created by elevated numerals, a deeply signed buckle, and detailed case sides. The watch is also noted for being practically mark-free with no dings found, and comes with a barely worn brown leather AVI-8 OEM strap. On balance, owners rate the AVI-8 Spitfire Smith Automatic highly for its detailed finishing and pristine condition.

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
Spitfire Smith Automatic42mm
Speedbird PRS-5136mm
Power Reserve
Spitfire Smith Automatic
Speedbird PRS-51
Water Resistance
Spitfire Smith Automatic50m
Speedbird PRS-51100m
MSRP
Spitfire Smith Automatic$490
Speedbird PRS-51$436

Full specifications

Case

6 specs
Category
Pilot
Diameter
42mm
36mm
Thickness
11.4mm
Lug-to-Lug
42mm
Lug Width
22mm
18mm
Water Resistance
50m
100m

Crystal & Dial

3 specs
Crystal
Mineral
Sapphire
Dial Color
WOOLSTON
Black
Lume
None
SuperLuminova X1-C3

Movement

2 specs
Caliber
Miyota 9015
Power Reserve
0h

Pricing

1 specs
MSRP
$490
$436
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