Side by side
ANGLES Watches The KOI-5vsTissot Gentleman Open Heart
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
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At a glance
15 of 29 specs differDiameter
The KOI-541mm
Gentleman Open Heart40mm
Power Reserve
The KOI-536h
Gentleman Open Heart80h
Water Resistance
The KOI-550m
Gentleman Open Heart100m
MSRP
The KOI-5$560
Gentleman Open Heart$1,025
Full specifications
Case
7 specsCategory
—
Chronograph
Diameter
41mm
40mm
Thickness
8.8mm
11.5mm
Lug-to-Lug
0mm
40mm
Lug Width
20mm
21mm
Material
Titanium
Stainless Steel
Water Resistance
50m
100m
Crystal & Dial
5 specsCrystal Shape
—
Domed
AR Coating
—
Yes
Dial Color
—
Silver
Indices
—
Indexes
Lume
None
Super-LumiNova ®
Movement
2 specsCaliber
Miyota 9039
11.5'
Power Reserve
36h
80h
Pricing
1 specsMSRP
$560
$1,025
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