Casio EFB-730DvsNezumi Studios Tonnerre
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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.

EFB-730D

Tonnerre
Diameter
40mm
38mm
Lug-to-Lug
47mm
45.5mm
lowest
Thickness
11mm
lowest
11.8mm
Water Resistance
100m
highest
50m
MSRP
$165
lowest
$423
Movement
Quartz
Seiko VK63
Case
6 specsCrystal & Dial
2 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Casio EFB-730D for its 40mm size, which is considered perfect for smaller to medium wrists and versatile for strap changes with its 20mm lug width. The subtle sunburst blue dial is noted as classy and better in person than in photos, and the overall finish is considered quite good for the price. Some owners find the constantly running central seconds hand impractical, while others appreciate its straightforward Casio quartz reliability and value around $150. One owner reported the second hand sticking on the minute hand, and another found the 47mm lug-to-lug measurement wore larger than expected. Overall, owners rate the Casio EFB-730D highly for its comfortable wearability and attractive design at the price point.
The Nezumi Studios Tonnerre is widely praised for its comfortable 38mm case, sharp finishing, and retro design, with many owners appreciating its quality and presentation exceeding expectations for its price point. The Seiko VK63 meca-quartz movement offers reliable accuracy, and the dial colors and textures are frequently highlighted as unique and attractive features, complemented by a good quality strap. Some owners find the chronograph sub-dial hands' chromatic arrangement for the 24-hour indicator to be an unnecessary aesthetic choice, and a few have expressed disappointment with customer service or found the chronograph's sub-dial alignment prone to issues. On balance, owners and reviewers rate the Nezumi Tonnerre highly for its compelling retro aesthetic and excellent finishing at its price point.
The watch features a 38mm brushed stainless steel case that fits smaller wrists well. The 5 ATM water resistance is limited for a tool-oriented chronograph.
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