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Cincinnati Watch Company P-40 A-11 Pilot Black AutomaticvsSeiko Prospex Sea 1968 Heritage Diver's GMT

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Cincinnati Watch Company P-40 A-11 Pilot Black Automatic

Owners widely praise the Cincinnati Watch Company P-40 A-11 Pilot Black Automatic for its sharp finishing, textured pearlescent dial, and excellent lume. The simple, understated design and comfortable 38mm size are also frequently highlighted. Some owners note the bracelet lacks quick micro-adjustments and the quick-release spring bars can dig into the wrist. One owner found the lume blocks potentially thinner and the font on larger numbers less desirable than a standard typeface, though the seconds hand was considered a success. Overall, owners highly recommend the Cincinnati Watch Company P-40 A-11 Pilot Black Automatic for its great craftsmanship and value.

Seiko Prospex Sea 1968 Heritage Diver's GMT

The Seiko Prospex Sea 1968 Heritage Diver's GMT is widely praised for its build quality, finishing, and comfortable wearability, offering good value for its price point. Owners and reviewers highlight the attractive silver/white sunray dial, blue ceramic bezel, and the premium feel of the improved bracelet clasp with excellent micro-adjustment. The Caliber 6R54 movement provides a 72-hour power reserve, and real-world accuracy often exceeds its stated range of +25 to -15 seconds per day, with some owners reporting figures around +3 to +5 seconds per day. However, the caller-style GMT functionality is a point of contention for some, who find the GMT scale difficult to read and prefer a flyer GMT at this price. Some also find the crown position at 4 o'clock undesirable, and a few note a lack of dial contrast or illegibility of the inner bezel.

At a glance

16 of 29 specs differ
Diameter
P-40 A-11 Pilot Black Automatic38mm
Prospex Sea 1968 Heritage Diver's GMT42mm
Power Reserve
P-40 A-11 Pilot Black Automatic65h
Prospex Sea 1968 Heritage Diver's GMT72h
Water Resistance
P-40 A-11 Pilot Black Automatic100m
Prospex Sea 1968 Heritage Diver's GMT200m
MSRP
P-40 A-11 Pilot Black Automatic$895
Prospex Sea 1968 Heritage Diver's GMT$1,500

Full specifications

Case

7 specs
Category
Pilot
Diver
Diameter
38mm
42mm
Thickness
10.8mm
12.9mm
Lug-to-Lug
46.5mm
48.6mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
100m
200m
Caseback
Screw Down w/ Sapphire Display

Crystal & Dial

4 specs
Crystal Shape
Domed
AR Coating
Underside
Anti-reflective coating on inner surface
Dial Color
Black
Lume
X1 C3
LumiBrite on hands, index(es) and bezel

Movement

4 specs
Caliber
Sellita SW200-1
Seiko 6R54
Beat Rate
28,800 vph
0 vph
Power Reserve
65h
72h
Jewels
26
24

Pricing

1 specs
MSRP
$895
$1,500
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