Side by side

Hamilton Khaki Field King Day-DatevsTimefactors Speedbird PRS-51

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

Khaki Field King Day-Date
HamiltonKhaki Field King Day-Date
MSRP $845
Speedbird PRS-51
TimefactorsSpeedbird PRS-51
MSRP $436
What people say

Owners + reviewers, side by side

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

Hamilton Khaki Field King Day-Date

Hamilton Khaki Field King Day-Date owners widely praise its classic styling, 80-hour power reserve, and excellent value. Opinions on water resistance are split; some express concern over the 50m rating, while others find it sufficient for daily wear and swimming. One owner notes the stock strap can be stiff. Service costs range from $55 for routine maintenance to $220 for full service with movement replacement. On balance, owners rate the Hamilton Khaki Field King Day-Date highly for its classic aesthetics and impressive power reserve at its price point.

From video reviewers

The 80-hour power reserve from the H-40 automatic movement is a significant strength. The 50-meter water resistance is considered a limitation for a field watch.

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

9 of 29 specs differ
Diameter
Khaki Field King Day-Date40mm
Speedbird PRS-5136mm
Power Reserve
Khaki Field King Day-Date80h
Speedbird PRS-51
Water Resistance
Khaki Field King Day-Date100m
Speedbird PRS-51100m
MSRP
Khaki Field King Day-Date$845
Speedbird PRS-51$436

Full specifications

Case

5 specs
Category
Field
Diameter
40mm
36mm
Thickness
11.8mm
11.4mm
Lug-to-Lug
50mm
42mm
Lug Width
20mm
18mm

Crystal & Dial

1 specs
Lume
None
SuperLuminova X1-C3

Movement

2 specs
Caliber
H-40 (ETA 2834-2 base)
Miyota 9015
Power Reserve
80h

Pricing

1 specs
MSRP
$845
$436
Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Follow this matchup

Get a note when Hamilton Khaki Field King Day-Date vs Timefactors Speedbird PRS-51 gets more votes, a community discussion, or a price drop. No account needed.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.