Side by side
Borealis Watch Co. Caloura 300mvsRolex Deepsea Challenge
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
15 of 29 specs differDiameter
Caloura 300m42mm
Deepsea Challenge50mm
Power Reserve
Caloura 300m40h
Deepsea Challenge70h
Water Resistance
Caloura 300m300m
Deepsea Challenge1,000m
MSRP
Caloura 300m$275
Deepsea Challenge$29,100
Full specifications
Case
8 specsDiameter
42mm
50mm
Thickness
13.9mm
9.5mm
Lug-to-Lug
44.20mm
46mm
Lug Width
22mm
—
Material
Stainless Steel
RLX Titanium
Finish
Brushed and polished
RLX titanium
Water Resistance
300m
1000m
Caseback
Solid
Monobloc middle case, screw-down case back and winding crown. Rolex Ringlock system case architecture with nitrogen-alloyed steel ring and helium escape valve
Crystal & Dial
3 specsAR Coating
Inner
—
Indices
Applied
Index
Lume
BGW9
Chromalight
Movement
3 specsCaliber
Seiko NH35
3230
Power Reserve
40h
70h
Jewels
25
31
Pricing
1 specsMSRP
$275
$29,100
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