Side by side

Serica Ref. 5303 Diving ChronometervsFerro Time Master 70

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
Time Master 70
FerroTime Master 70
MSRP $685

At a glance

13 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Time Master 7047mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Time Master 7040h
Water Resistance
Ref. 5303 Diving Chronometer300m
Time Master 7050m
MSRP
Ref. 5303 Diving Chronometer$1,768
Time Master 70$685

Full specifications

Case

6 specs
Category
Diver
Chronograph
Diameter
39mm
47mm
Thickness
12.2mm
13mm
Lug-to-Lug
46.5mm
47mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
300m
50m

Crystal & Dial

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

Movement

3 specs
Caliber
M100 COSC
Miyota 9039
Power Reserve
42h
40h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$685

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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.

Ferro Time Master 70

The Ferro Time Master 70 is praised for its distinctive 1970s-inspired polygon case and visually striking silver dial with orange accents and unique lume colors. Owners appreciate the retro design with unique touches, clean dial, and lumed markers, along with the smooth winding of the Miyota 9039 movement. Its 39mm diameter, 10.4mm thickness, and 47mm lug-to-lug dimensions contribute to comfortable wearability, further enhanced by a well-executed faux-single link bracelet featuring a practical on-the-fly micro-adjustment clasp. On balance, owners and reviewers rate the Ferro Time Master 70 highly for its retro design and comfortable wearability.

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