Side by side

Serica Ref. 5303 Diving ChronometervsFortis Marinemaster M-44

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
Marinemaster M-44
FortisMarinemaster M-44
MSRP $5,120

At a glance

12 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Marinemaster M-4444mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Marinemaster M-4438h
Water Resistance
Ref. 5303 Diving Chronometer300m
Marinemaster M-44300m
MSRP
Ref. 5303 Diving Chronometer$1,768
Marinemaster M-44$5,120

Full specifications

Case

4 specs
Diameter
39mm
44mm
Thickness
12.2mm
14mm
Lug-to-Lug
46.5mm
Lug Width
20mm
22mm

Crystal & Dial

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

Movement

4 specs
Caliber
M100 COSC
Sellita SW220-1
Power Reserve
42h
38h
Jewels
25
26
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$5,120

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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.

Fortis Marinemaster M-44

The Fortis Marinemaster M-44 is praised for its excellent build quality and wearability, featuring a highly legible dial and a COSC-certified Kenissi-based movement that ran at 0 seconds per day. Owners appreciate its 70-hour power reserve and the inclusion of multiple straps and a deployant buckle, noting its gorgeous appearance and great wrist presence. A minor point raised is the 21mm lug width, with a wish for it to be 22mm. The Fortis Marinemaster M-44 is priced at $4,150. Overall, owners and reviewers rate the Fortis Marinemaster M-44 highly for its robust specifications and comfortable wearability at its price point.

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