Knot Watches SAC-40SSVvsLum-Tec Solar Marine
lug2lug doesn't sell watches. Buy links open the brand's or seller's own site. Some links are affiliate links: lug2lug may earn a commission at no extra cost to you. Disclosures
Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

SAC-40SSV

Solar Marine
Diameter
40mm
39mm
Lug-to-Lug
n/a
43.5mm
Thickness
11.5mm
10.7mm
lowest
Water Resistance
200m
300m
highest
MSRP
$296
lowest
$545
Movement
Seiko Epson PX82
Seiko VS42
Case
6 specsCrystal & Dial
1 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 Watches SAC-40SSV for its Seiko-like finishing and attractive price point, with many appreciating its light feel and the quality of the strap and deployment buckle, though some find it initially stiff. The 40mm size is a point of contention, with some finding it comfortable and a favorite, while others consider it too large and prefer the 38mm variant. A recurring criticism is the small, awkwardly placed crown, which makes winding difficult. One owner also noted poor engraving and considered the watch to be primarily a fashion piece. Overall, owners rate the Knot Watches SAC-40SSV positively for its finishing and value, despite some reservations about the crown design and sizing.
The Lum-Tec Solar Marine is widely praised for its excellent lume, robust build quality, and fantastic finishing, making it a great grab-and-go tool watch. Owners appreciate its solar-powered quartz movement for low-maintenance performance and its comfortable 39mm case size, though some feel it wears smaller. One owner notes that the PVD coating may wear and chip over time. The Lum-Tec Solar Marine is highly regarded for its exceptional lume and quality finishing at its price point.
Similar watches
Matched to the watches above on size, movement, style and price, microbrands first. Open any one to dig in.
Also compared
Comparisons nearby in the catalog: alternatives to the watches above paired against the matchup.







![Momentum Splash Eclipse Solar [38mm]](/_next/image?url=%2Fimages%2Fwatches%2Fsm%2Fmomentum--splash-eclipse-38mm-white.png%3Fv%3D1794243814127&w=1536&q=55)


