Side by side
Borealis Watch Co. Caloura 300mvsSheffield 1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap)
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
10 of 29 specs differDiameter
Caloura 300m42mm
1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap)38mm
Power Reserve
Caloura 300m40h
1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap)—
Water Resistance
Caloura 300m300m
1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap)200m
MSRP
Caloura 300m$275
1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap)$223
Full specifications
Case
5 specsDiameter
42mm
38mm
Thickness
13.9mm
12.8mm
Lug-to-Lug
44.20mm
46mm
Lug Width
22mm
20mm
Water Resistance
300m
200m
Crystal & Dial
2 specsDial Color
Black
Blue
Lume
BGW9
None
Movement
2 specsCaliber
NH35
Seiko NH35
Power Reserve
40h
—
Pricing
1 specsMSRP
$275
$223
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