Side by side

Serica Ref. 5303 Diving ChronometervsSeestern Sub 300 V4

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
Sub 300 V4
SeesternSub 300 V4
MSRP $10

At a glance

16 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Sub 300 V442mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Sub 300 V441h
Water Resistance
Ref. 5303 Diving Chronometer300m
Sub 300 V4200m
MSRP
Ref. 5303 Diving Chronometer$1,768
Sub 300 V4$10

Full specifications

Case

7 specs
Diameter
39mm
42mm
Thickness
12.2mm
13mm
Lug-to-Lug
46.5mm
46mm
Material
Stainless Steel
316L Stainless Steel
Finish
Brushed and polished
Brushed + Sandblasted
Water Resistance
300m
200m
Caseback
Solid
Solid screw-down

Crystal & Dial

3 specs
AR Coating
Yes
Underside
Dial Color
Enamel Black
Orange
Lume
Super-LumiNova
Japan Lume (blue glow)

Movement

5 specs
Caliber
M100 COSC
Seiko NH35A
Beat Rate
28,800 vph
21,600 vph
Power Reserve
42h
41h
Jewels
25
24
Complications
COSC
GMT, Date

Pricing

1 specs
MSRP
$1,768
$10

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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.

Seestern Sub 300 V4

Owners widely praise the Seestern Sub 300 V4 for its terrific fit and finish and surprising little touches at its $179 price, noting top-notch case, dial, bezel, and crystal. The bracelet is considered nice enough for the price point, and the watch is powered by the solid and reliable Seiko NH35 movement. Some owners report that the polished sides of the case show signs of wear. Overall, owners rate the Seestern Sub 300 V4 highly for its excellent case, dial, and bezel finishing at the price.

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