Side by side

Serica Ref. 5303 Diving ChronometervsWilliam Wood National Fallen Firefighters Foundation Watch

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

Ref. 5303 Diving Chronometer
SericaRef. 5303 Diving Chronometer
MSRP $1,768

At a glance

13 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
National Fallen Firefighters Foundation Watch41mm
Power Reserve
Ref. 5303 Diving Chronometer42h
National Fallen Firefighters Foundation Watch40h
Water Resistance
Ref. 5303 Diving Chronometer300m
National Fallen Firefighters Foundation Watch100m
MSRP
Ref. 5303 Diving Chronometer$1,768
National Fallen Firefighters Foundation Watch$820

Full specifications

Case

5 specs
Diameter
39mm
41mm
Thickness
12.2mm
15mm
Lug-to-Lug
46.5mm
49mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
300m
100m

Crystal & Dial

4 specs
Crystal
Sapphire
Domed Sapphire
AR Coating
Yes
Inner
Dial Color
Enamel Black
Standard
Lume
Super-LumiNova
None

Movement

3 specs
Caliber
M100 COSC
Seiko NH35
Power Reserve
42h
40h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$820

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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.

Serica Ref. 5303 Diving Chronometer

Owners widely praise the Serica Ref. 5303 Diving Chronometer for its excellent wearability, definitive style, and smooth, confident bezel action. The dual scale on the bezel is noted as surprisingly useful, and the crown action, winding, and hacking are reported to work perfectly. One owner describes the Serica 5303-3 as gorgeous and unique, though another notes the crown can appear comically large. On balance, owners rate the Serica Ref. 5303 Diving Chronometer highly for its blend of unique design and robust functionality.

William Wood National Fallen Firefighters Foundation Watch

The case is crafted from upcycled firefighting materials, offering a unique story. The straps are made from upcycled fire hoses, a unique material nod to its heritage.

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