Knot Watches Knot TSC-40 ChronographvsSeiko Prospex SPEEDTIMER

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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.

Knot TSC-40 Chronograph

Prospex SPEEDTIMER
Diameter
40mm
39mm
Lug-to-Lug
n/a
45.5mm
Thickness
11mm
lowest
13.3mm
Water Resistance
100m
100m
MSRP
$281
lowest
$725
Movement
Seiko (Epson) VR43
Seiko V192
Case
5 specsCrystal & Dial
4 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Knot TSC-40 Chronograph's design and value, with one owner calling it a well-made souvenir from Tokyo appreciating its Japanese origin and exclusivity. The watch is noted for its lightness and a soft, ready-to-wear leather strap, though one owner found the strap disappointing and the engraving quality lacking. Another owner found the 18mm strap width slimmer than desired on the 39mm model. The Knot TSC-40 Chronograph utilizes a Seiko (Epson) VR43 solar chronograph movement and features double-drilled lugs for strap changes. Overall, owners rate the Knot TSC-40 Chronograph highly for its design and value proposition, with the main points of contention being strap quality and engraving.
Owners widely praise the Seiko Prospex SPEEDTIMER for its vintage-inspired design and versatility as an everyday watch. Some owners find the 39mm case size comfortable and well-suited for active use. Reviewers note the solar-powered V192 movement offers a six-month power reserve. Criticisms include the watch's thickness, which some find to be between 13-15mm, and the 24-hour subdial. The price point is a recurring point of contention, with some owners questioning the value for a solar quartz chronograph. On balance, owners and reviewers find the Seiko Prospex SPEEDTIMER a capable and attractive watch, with its design being the most frequently cited positive attribute.
The Seiko Prospex SPEEDTIMER's solar movement provides reliable power without battery replacements and accurate timekeeping, with a claimed accuracy of ±15 seconds per month. A notable trade-off is the watch's slightly thicker profile and somewhat lacking lume brightness. Reviewers disagree on whether the bezel action is smooth and clicky, with one reviewer praising it and the other not mentioning it.
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