Side by side
Serica Ref. 5303 Diving ChronometervsLum-Tec B73
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
16 of 29 specs differDiameter
Ref. 5303 Diving Chronometer39mm
B7344mm
Power Reserve
Ref. 5303 Diving Chronometer42h
B7340h
Water Resistance
Ref. 5303 Diving Chronometer300m
B73200m
MSRP
Ref. 5303 Diving Chronometer$1,768
B73$463
Full specifications
Case
7 specsCategory
Diver
Sport
Diameter
39mm
44mm
Thickness
12.2mm
—
Lug-to-Lug
46.5mm
51.5mm
Lug Width
20mm
22mm
Material
Stainless Steel
316L Stainless Steel (DLC coated)
Water Resistance
300m
200m
Crystal & Dial
4 specsCrystal
Sapphire
Domed Sapphire
AR Coating
Yes
Inner
Dial Color
Enamel Black
B73
Lume
Super-LumiNova
None
Movement
4 specsCaliber
M100 COSC
Ronda 515
Type
Automatic
Quartz
Power Reserve
42h
40h
Complications
COSC
None
Pricing
1 specsMSRP
$1,768
$463
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