Elliot Brown HOLTON AUTOMATIC: 101-A10vsSeiko 5KX
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Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

HOLTON AUTOMATIC: 101-A10

5KX
Diameter
43mm
42.5mm
Lug-to-Lug
n/a
46mm
Thickness
14mm
13.4mm
lowest
Water Resistance
200m
highest
100m
Power Reserve
40h
41h
highest
MSRP
$792
$350
lowest
Movement
Seiko NH35
Seiko 4R36
Case
5 specsCrystal & Dial
3 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The Elliot Brown HOLTON AUTOMATIC: 101-A10 is noted as an issued watch for UKSF, bearing a crow's foot and NSN marking. One owner reports the dial lume is lackluster, potentially due to the vintage aesthetic influencing the choice of Super-LumiNova. Overall, owners rate the Elliot Brown HOLTON AUTOMATIC: 101-A10 for its military provenance and issued status.
Owners widely praise the Seiko 5KX for its strong lume and value, with many reporting accuracy within +/-5 to 10 seconds per day, though some experience +/-1 second. The 42.5mm case is noted to wear smaller, and the watch offers a comfortable feel for many. Some owners are split on the bracelet quality, with opinions ranging from "cheaper side" with hollow links to "flimsy-feeling" jubilee. A few quality control issues have been reported, including a failed bezel clickspring and misaligned components. The Seiko 5KX is seen by some as a worthy successor to the original SKX, offering an upgraded movement with hacking and hand-winding capabilities, though others lament the loss of ISO certification and a screw-down crown. Overall, owners rate the Seiko 5KX highly for its excellent lume and value proposition, making it a popular choice for everyday wear.
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