Addiesdive 37mm VK63/0S20 Triple-Register Chronograph Watch AD2517/AD2543vsUndone Tachikoma
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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.

37mm VK63/0S20 Triple-Register Chronograph Watch AD2517/AD2543

Tachikoma
Diameter
37mm
41.8mm
Lug-to-Lug
46mm
n/a
Thickness
12.7mm
12.7mm
Water Resistance
100m
100m
MSRP
$89
lowest
$320
Movement
Seiko VK63
Seiko VK63
Case
3 specsCrystal & Dial
1 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Addiesdive 37mm VK63/0S20 Triple-Register Chronograph Watch AD2517/AD2543 for its surprising quality and finishing, with a bracelet that rivals Seiko 5 series watches and bright, durable BGW9 lume. Reviewers highlight the value proposition, citing the sapphire crystal, solid endlinks, milled clasp, and 100m water resistance for around $59, along with the dial's depth and texture. Some owners report the VK63 chronograph seconds hand can become misaligned, and one noted a misaligned bezel insert requiring reattachment, though others find the movement reliable and the watch comfortable and wearable. Overall, owners and reviewers rate the Addiesdive 37mm VK63/0S20 Triple-Register Chronograph Watch AD2517/AD2543 highly for its exceptional value and surprising build quality at its price point.
Owners widely report the Undone Tachikoma is a great purchase at its price point. However, some commenters feel the design lacks detailed anime references and find the price too high for an IP collaboration without a recognized watch brand. Overall, owners rate the Undone Tachikoma highly for its value, though opinions are split on its visual connection to the anime.
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