Side by side

Serica Ref. 5303 Diving ChronometervsAstor + Banks Fortitude Pro

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
Fortitude Pro
Astor + BanksFortitude Pro
MSRP $675

At a glance

13 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Fortitude Pro38.5mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Fortitude Pro40h
Water Resistance
Ref. 5303 Diving Chronometer300m
Fortitude Pro200m
MSRP
Ref. 5303 Diving Chronometer$1,768
Fortitude Pro$675

Full specifications

Case

6 specs
Category
Diver
Sport
Diameter
39mm
38.5mm
Thickness
12.2mm
11.9mm
Lug-to-Lug
46.5mm
45.5mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
300m
200m

Crystal & Dial

3 specs
AR Coating
Yes
Inner
Dial Color
Enamel Black
Magenta
Lume
Super-LumiNova
None

Movement

3 specs
Caliber
M100 COSC
Miyota 9015
Power Reserve
42h
40h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$675

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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.

Astor + Banks Fortitude Pro

Owners and reviewers widely praise the Astor + Banks Fortitude Pro for its scratch-resistant coating, thin and compact 38.5mm case, and versatile dial options. The layered finishing with polished chamfers and comfortable bracelet are frequently highlighted as strong points, contributing to its wearability. One owner notes good timekeeping, while a reviewer states the Miyota 9015 movement is adjusted to +/-10 seconds per day. A potential drawback mentioned is the date numeral appearing in half shadow due to anti-magnetic shielding, and one owner considers the bracelet clasp dated. Overall, owners and reviewers rate the Astor + Banks Fortitude Pro highly for its durable construction and thoughtful design at its price point.

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