AVI-8 Spitfire Lock ChronographvsSeiko Astron GPS Solar 2025 Limited Edition

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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.

AVI-8 Spitfire Lock Chronograph at true scale

Spitfire Lock Chronograph

Seiko Astron GPS Solar 2025 Limited Edition at true scale

Astron GPS Solar 2025 Limited Edition

Diameter

42mm

43.4mm

Lug-to-Lug

50mm

49.5mm

lowest

Thickness

12mm

lowest

13.4mm

Water Resistance

50m

100m

highest

MSRP

$260

lowest

$2,900

Movement

Quartz

Seiko 5X83

Case

6 specs
Diameter
42mm
43.4mm
Thickness
12mm
13.4mm
Lug-to-Lug
50mm
49.5mm
Lug Width
22mm
14mm
Material
316L Stainless Steel
Titanium
Water Resistance
50m
100m

Crystal & Dial

5 specs
Crystal
Mineral
Sapphire
Crystal Shape
n/a
Curved
AR Coating
n/a
Super-clear coating
Dial Color
MIDNIGHT OAK
n/a
Lume
None
LumiBrite on hands and index(es)

Movement

2 specs
Caliber
n/a
Seiko 5X83
Jewels
0
14

Pricing

1 specs
MSRP
$260
$2,900
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Reviews

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

AVI-8 Spitfire Lock Chronograph

Owners widely appreciate the AVI-8 Spitfire Lock Chronograph's compelling design, drawing inspiration from Supermarine Spitfires with details like a prominent crown and rivets, and find the build quality excellent for the price. The watch features a 42mm stainless steel case with curved lugs for wearability, a bi-compax layout with subdials for elapsed time and a 24-hour scale, and black lume that glows green. Some owners note that AVI-8 watches offer something different and are decently well-made, though not of insane quality, and one reviewer found the included leather strap and bracelet to be the weakest aspects. On balance, owners and reviewers rate the AVI-8 Spitfire Lock Chronograph highly for its striking design and good value at its price point.

Seiko Astron GPS Solar 2025 Limited Edition

Owners praise the Seiko Astron GPS Solar 2025 Limited Edition for its advanced satellite timekeeping and perpetual calendar, with a legible dial and high-quality titanium or steel case featuring a ceramic bezel. However, its size is noted as enormous, with some finding it wears large and doesn't fit well under shirt sleeves, though the technology is considered very cool. GPS signal reception requires a clear view of the sky, which can be an issue indoors. On balance, owners and reviewers rate the Seiko Astron GPS Solar 2025 Limited Edition highly for its cutting-edge satellite timekeeping technology.