Which is cheaper, the Cincinnati Watch Company P-40 A-11 Pilot Black Automatic or the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition?

At MSRP the Cincinnati Watch Company P-40 A-11 Pilot Black Automatic is the cheaper of the two at $895, against $1,350 for the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition — a $455 gap before any retailer discounting.

Which is bigger, the Cincinnati Watch Company P-40 A-11 Pilot Black Automatic or the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition?

The Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition wears larger at 42.7mm versus 38mm for the Cincinnati Watch Company P-40 A-11 Pilot Black Automatic — a 4.7mm difference across the dial.

Which has better water resistance, the Cincinnati Watch Company P-40 A-11 Pilot Black Automatic or the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition?

The Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition is rated to 200m versus 100m for the Cincinnati Watch Company P-40 A-11 Pilot Black Automatic.

Which has a longer power reserve, the Cincinnati Watch Company P-40 A-11 Pilot Black Automatic or the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition?

The Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition carries a 70-hour power reserve against 65 hours on the Cincinnati Watch Company P-40 A-11 Pilot Black Automatic.

What movement does the Cincinnati Watch Company P-40 A-11 Pilot Black Automatic run compared to the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition?

Both watches run automatic movements — the Cincinnati Watch Company P-40 A-11 Pilot Black Automatic uses the Sellita SW200-2 and the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition uses the 6R35.

Side by side

Cincinnati Watch Company P-40 A-11 Pilot Black AutomaticvsSeiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition

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

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

p-40-a-11-black-automatic-mechanical-pilot-watch

MSRP $895

Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition

spb301j1

MSRP $1,350

At a glance

16 of 29 specs differ

Diameter

P-40 A-11 Pilot Black Automatic38mm

Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition42.7mm

Power Reserve

P-40 A-11 Pilot Black Automatic65h

Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition70h

Water Resistance

P-40 A-11 Pilot Black Automatic100m

Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition200m

MSRP

P-40 A-11 Pilot Black Automatic$895

Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition$1,350

Full specifications

Case

8 specs

Crystal & Dial

4 specs

Crystal Shape

Domed

Curved

AR Coating

Underside

Anti-reflective coating on inner surface

Indices

—

Applied

Lume

X1 C3

LumiBrite on hands, index(es) and bezel

Movement

3 specs

Caliber

Sellita SW200-2

6R35

Power Reserve

65h

70h

Jewels

Pricing

1 specs

MSRP

$895

$1,350

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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.

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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Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition

The Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition is praised for its beautiful design and refinement over previous models, featuring vertically textured glacier-inspired dials. Owners, however, consider the €1500 RRP too high, suggesting a price closer to €900-€1000, noting the aluminum bezel insert instead of ceramic. Some owners report the 6R movement runs slow. On balance, owners find the Seiko Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition beautiful and a refinement, but the price and aluminum bezel are points of contention.

Hodinkee

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