Side by side

Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's WatchvsCincinnati Watch Company P-40 A-11 Pilot Black Automatic

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

P-40 A-11 Pilot Black Automatic
Cincinnati Watch CompanyP-40 A-11 Pilot Black Automatic
MSRP $895

At a glance

16 of 29 specs differ
Diameter
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch42.6mm
P-40 A-11 Pilot Black Automatic38mm
Power Reserve
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch72h
P-40 A-11 Pilot Black Automatic65h
Water Resistance
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch300m
P-40 A-11 Pilot Black Automatic100m
MSRP
Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch$3,600
P-40 A-11 Pilot Black Automatic$895

Full specifications

Case

8 specs
Category
Diver
Pilot
Diameter
42.6mm
38mm
Thickness
14.1mm
10.8mm
Lug-to-Lug
49.3mm
46.5mm
Material
Stainless Steel
316L Stainless Steel
Finish
Brushed and polished
Water Resistance
300m
100m
Caseback
Solid
Screw Down w/ Sapphire Display

Crystal & Dial

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

Movement

3 specs
Caliber
8L45
Sellita SW200-2
Power Reserve
72h
65h
Jewels
35
26

Pricing

1 specs
MSRP
$3,600
$895

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What people say

Owners + reviewers, side by side

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

Seiko Prospex Marinemaster Marinemaster 1968 Heritage Diver's Watch

The Seiko Prospex Marinemaster 1968 Heritage Diver's Watch is widely praised for its excellent quality and finishing, with reviewers and owners noting its GS-level craftsmanship and Zaratsu-inspired polishing. Owners appreciate its refined design, comfortable case shape, and the 4:00 crown position, with some finding it more manageable on the wrist than other models. The Caliber 8L45 movement offers a 72-hour power reserve and accuracy within -5/+10 seconds per day, and the bracelet features an improved clasp with an extension system. However, some find the price point high, and one reviewer noted the unsigned winding crown as a missed opportunity. On balance, owners and reviewers rate the Seiko Prospex Marinemaster 1968 Heritage Diver's Watch highly for its premium finishing and tool-like appearance at its price point.

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.

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