Side by side

Hamilton American Classic Spirit of Liberty Auto ChronovsSeiko 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.

What people say

Owners + reviewers, side by side

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

Hamilton American Classic Spirit of Liberty Auto Chrono

Owners widely praise the Hamilton American Classic Spirit of Liberty Auto Chrono for its impressive craftsmanship, details, and overall finish, noting sharp edges on the mixed brushed and polished lugs that give it a premium look and a refined yet bold presence. The watch offers an improved 60-hour power reserve and increased precision. However, its pushers are noted as being chunky. On balance, owners rate the Hamilton American Classic Spirit of Liberty Auto Chrono highly for its premium finishing and refined presence on the wrist.

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.

At a glance

13 of 29 specs differ
Diameter
American Classic Spirit of Liberty Auto Chrono42mm
Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition42.7mm
Power Reserve
American Classic Spirit of Liberty Auto Chrono40h
Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition70h
Water Resistance
American Classic Spirit of Liberty Auto Chrono50m
Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition200m
MSRP
American Classic Spirit of Liberty Auto Chrono$2,225
Prospex Sea 1970 Heritage Diver's Save the Ocean Special Edition$1,350

Full specifications

Case

6 specs
Category
Chronograph
Diver
Diameter
42mm
42.7mm
Thickness
14.75mm
13.2mm
Lug-to-Lug
46mm
46.4mm
Lug Width
22mm
20mm
Water Resistance
50m
200m

Crystal & Dial

3 specs
Crystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
H-21
6R35
Power Reserve
40h
70h
Jewels
25
24

Pricing

1 specs
MSRP
$2,225
$1,350
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