Casio EFB-730DvsZelos ZX-4 Mechaquartz Chronograph

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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.

Casio EFB-730D at true scale

EFB-730D

Zelos ZX-4 Mechaquartz Chronograph at true scale

ZX-4 Mechaquartz Chronograph

Diameter

40mm

43mm

Lug-to-Lug

47mm

lowest

49mm

Thickness

11mm

lowest

16mm

Water Resistance

100m

100m

MSRP

$165

lowest

$549

Movement

Quartz

Valjoux 7750

Case

6 specs
Diameter
40mm
43mm
Thickness
11mm
16mm
Lug-to-Lug
47mm
49mm
Lug Width
n/a
n/a
Material
Stainless Steel
Titanium
Finish
n/a
n/a

Crystal & Dial

2 specs
AR Coating
No
Yes
Dial Color
Black
n/a

Movement

2 specs
Caliber
n/a
Valjoux 7750
Power Reserve
n/a
0h

Pricing

1 specs
MSRP
$165
$549
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Reviews

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Casio EFB-730D

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.

Zelos ZX-4 Mechaquartz Chronograph

Owners widely praise the Zelos ZX-4 Mechaquartz Chronograph for its value, noting its mechaquartz movement that combines quartz accuracy with a mechanical chronograph function, and its instant mechanical reset. The watch features a 43mm case with a 47mm lug-to-lug measurement and a 16mm height, arriving with a four-watch pouch and two distressed leather straps. Some owners clarify that while the reset is mechanical, the chronograph function is powered by a stepper motor, not a fully mechanical chronograph. Overall, owners rate the Zelos ZX-4 Mechaquartz Chronograph highly for its accessible price point and the functional blend of quartz and mechanical elements in its chronograph.