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The Humboldt Seven Year vs Naos Pro Automatik vs C65 Sandhurst Series 2 vs Skin Diver Slim CMM.20
Posted by · Jun 8, 2026
At a glance
18 of 29 specs differDiameter
The Humboldt Seven Year39.5mm
Naos Pro Automatik38mm
C65 Sandhurst Series 240mm
Skin Diver Slim CMM.2047mm
Power Reserve
The Humboldt Seven Year42h
Naos Pro Automatik42h
C65 Sandhurst Series 238h
Skin Diver Slim CMM.2040h
Water Resistance
The Humboldt Seven Year200m
Naos Pro Automatik50m
C65 Sandhurst Series 2150m
Skin Diver Slim CMM.20200m
MSRP
The Humboldt Seven Year$2,400
Naos Pro Automatik$755
C65 Sandhurst Series 2$1,375
Skin Diver Slim CMM.20$2,117
Full specifications
Case
7 specsCategory
Tool
Dress
—
Diver
Diameter
39.5mm
38mm
40mm
47mm
Thickness
12.4mm
9mm
11.9mm
10mm
Lug-to-Lug
46.8mm
42.4mm
43.7mm
47mm
Material
316L Stainless Steel + Brass
Stainless Steel
Stainless Steel
316L Stainless Steel
Finish
Brushed and polished
Brushed and polished
down backplate with deep-stamped British Army Heraldic badge
Brushed and polished
Water Resistance
200m
50m
150m
200m
Crystal & Dial
5 specsCrystal
Sapphire
Sapphire
Sapphire
Domed Sapphire
Crystal Shape
Double-domed
Flat
Flat
Flat
AR Coating
Underside
Inner
Inner
Inner
Dial Color
Black
—
Black
Steel
Lume
Super-LumiNova
Luminova Punkte
SLN Grade X1 BL C1
None
Movement
5 specsCaliber
Sellita SW300
Miyota 9015
SW200-1
Yema CMM.20
Beat Rate
4 vph
28,800 vph
4 vph
28,800 vph
Power Reserve
42h
42h
38h
40h
Jewels
25
—
26
25
Complications
GMT, Chronograph, Date
None
None
None
Pricing
1 specsMSRP
$2,400
$755
$1,375
$2,117
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