Side by side

Lum-Tec B66 Day DatevsSeiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition

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

B66 Day Date
Lum-TecB66 Day Date
MSRP $545
Prospex Sea 1970 Heritage Diver's Black Series Limited Edition
SeikoProspex Sea 1970 Heritage Diver's Black Series Limited Edition
MSRP $3,300

At a glance

15 of 29 specs differ
Diameter
B66 Day Date44mm
Prospex Sea 1970 Heritage Diver's Black Series Limited Edition44mm
Power Reserve
B66 Day Date40h
Prospex Sea 1970 Heritage Diver's Black Series Limited Edition50h
Water Resistance
B66 Day Date100m
Prospex Sea 1970 Heritage Diver's Black Series Limited Edition200m
MSRP
B66 Day Date$545
Prospex Sea 1970 Heritage Diver's Black Series Limited Edition$3,300

Full specifications

Case

6 specs
Category
Sport
Diver
Thickness
—
13mm
Lug-to-Lug
51.5mm
49.3mm
Lug Width
22mm
20mm
Material
Titanium (DLC coated)
Stainless Steel
Water Resistance
100m
200m

Crystal & Dial

5 specs
Crystal
Domed Sapphire
Sapphire
Crystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
Standard
Black
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
—
8L35
Power Reserve
40h
50h
Jewels
25
26

Pricing

1 specs
MSRP
$545
$3,300

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