Side by side
Serica Ref. 5303 Diving ChronometervsBoldr Blastoise
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
10 of 29 specs differDiameter
Ref. 5303 Diving Chronometer39mm
Blastoise40mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Blastoise40h
Water Resistance
Ref. 5303 Diving Chronometer300m
Blastoise200m
MSRP
Ref. 5303 Diving Chronometer$1,768
Blastoise$449
Full specifications
Case
4 specsDiameter
39mm
40mm
Thickness
12.2mm
12mm
Lug-to-Lug
46.5mm
49.5mm
Water Resistance
300m
200m
Crystal & Dial
2 specsAR Coating
Yes
Inner
Dial Color
Enamel Black
Blastoise
Movement
3 specsCaliber
M100 COSC
Seiko (SII) NH37
Power Reserve
42h
40h
Complications
COSC
None
Pricing
1 specsMSRP
$1,768
$449
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