Casio EFV-650DvsUndone Mystique Neptune
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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.

EFV-650D

Mystique Neptune
Diameter
43.5mm
40mm
Lug-to-Lug
48.6mm
n/a
Thickness
11mm
n/a
Water Resistance
100m
highest
30m
MSRP
$120
lowest
$265
Movement
Quartz
Seiko VK61
Case
6 specsCrystal & Dial
3 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 EFV-650D for its value, costing less than half of comparable models and including illumination. The chronograph layout is noted as different from typical chronographs, which some find affects the user experience despite an attractive look. The 43.5mm case size is considered intimidating by some for smaller wrists, with one owner questioning its suitability as a first chronograph. One owner finds the watch "sick" and is considering upgrading the mineral crystal to sapphire. Overall, owners rate the Casio EFV-650D highly for its value and illumination, despite some reservations about its chronograph layout and case size.
The Undone Mystique Neptune is widely praised for its eye-catching and sophisticated smoked dials, which reviewers note are achieved through a painted rather than printed technique, offering remarkable dial sophistication for its price point. Owners consistently find the dial appearance superior in person to photographs. The watch utilizes a Seiko VK61 meca-quartz movement, providing the convenience of quartz with mechanical chronograph functionality. One owner finds the 40mm case size too large for their preference, despite the dial being spectacular. Overall, owners and reviewers highly regard the Undone Mystique Neptune for its exceptional dial finishing and sophisticated appearance at an accessible price.
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