Side by side

Serica Ref. 5303 Diving ChronometervsMaen Skymaster 38 MKIII

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
Skymaster 38 MKIII
MaenSkymaster 38 MKIII
MSRP $1,679

At a glance

15 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Skymaster 38 MKIII38mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Skymaster 38 MKIII40h
Water Resistance
Ref. 5303 Diving Chronometer300m
Skymaster 38 MKIII100m
MSRP
Ref. 5303 Diving Chronometer$1,768
Skymaster 38 MKIII$1,679

Full specifications

Case

7 specs
Category
Diver
Chronograph
Diameter
39mm
38mm
Thickness
12.2mm
13.4mm
Lug-to-Lug
46.5mm
Lug Width
20mm
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
M6.1.1
Lume
Super-LumiNova
None

Movement

3 specs
Caliber
M100 COSC
Sellita SW510mb
Power Reserve
42h
40h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$1,679

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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.

Maen Skymaster 38 MKIII

The Maen Skymaster 38 MKIII is praised for its refined case, impressive fit and finish, and compact 38mm size, which offers a premium feel with a sharp, legible dial and well-executed applied markers. Reviewers note the sweet winding action and the vintage-inspired brown sunburst dial with dauphine hands and lollipop register pointers. The watch is powered by a manual-wind Sellita SW510Mb movement with a 63-hour power reserve. Accuracy figures vary, with one reviewer reporting +7 seconds per day and another stating a tolerance of +/-15 seconds per day. On balance, owners and reviewers appreciate the Maen Skymaster 38 MKIII for its refined vintage-inspired design and compact dimensions at its price point.

From video reviewers

The 38mm case size is a key strength for the Maen Skymaster 38 MKIII. Reviewers noted the excellent quality-price ratio for a Swiss-made chronograph.

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