Side by side
AVI-8 Bell X-1 Machbuster AutomaticvsSeiko Prospex Sea
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
13 of 29 specs differDiameter
Bell X-1 Machbuster Automatic—
Prospex Sea43.8mm
Power Reserve
Bell X-1 Machbuster Automatic40h
Prospex Sea41h
Water Resistance
Bell X-1 Machbuster Automatic50m
Prospex Sea200m
MSRP
Bell X-1 Machbuster Automatic$350
Prospex Sea$625
Full specifications
Case
7 specsCategory
Pilot
Diver
Diameter
—
43.8mm
Thickness
13mm
12.8mm
Lug-to-Lug
51mm
48.7mm
Lug Width
—
22mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
50m
200m
Crystal & Dial
2 specsAR Coating
Inner
Anti-reflective coating on inner surface
Lume
None
LumiBrite on hands, index(es) and bezel
Movement
3 specsCaliber
—
4R35
Power Reserve
40h
41h
Jewels
25
23
Pricing
1 specsMSRP
$350
$625
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