Side by side
Casio GMD-B300vsUndone ZEN CARTOGRAPH: MK-1 PROTOTYPE
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
13 of 29 specs differDiameter
GMD-B30043.8mm
ZEN CARTOGRAPH: MK-1 PROTOTYPE40mm
Power Reserve
GMD-B300—
ZEN CARTOGRAPH: MK-1 PROTOTYPE—
Water Resistance
GMD-B300200m
ZEN CARTOGRAPH: MK-1 PROTOTYPE50m
MSRP
GMD-B300$135
ZEN CARTOGRAPH: MK-1 PROTOTYPE$199
Full specifications
Case
8 specsCategory
Sport
—
Diameter
43.8mm
40mm
Thickness
12mm
0mm
Lug-to-Lug
46.4mm
0mm
Lug Width
—
0mm
Material
Resin / Bio-based resin
Stainless Steel
Finish
—
—
Water Resistance
200m
50m
Crystal & Dial
3 specsCrystal
Mineral
—
AR Coating
No
—
Dial Color
Black
—
Movement
1 specsCaliber
—
Seiko 9F68
Pricing
1 specsMSRP
$135
$199
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