Serica Ref. 5303 Diving ChronometervsOrient AC0Q-40 Diver

lug2lug doesn't sell watches. Buy links open the brand's or seller's own site. Some links are affiliate links: lug2lug may earn a commission at no extra cost to you. Disclosures

Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Serica Ref. 5303 Diving Chronometer at true scale

Ref. 5303 Diving Chronometer

Orient AC0Q-40 Diver at true scale

AC0Q-40 Diver

Diameter

39mm

39.9mm

Lug-to-Lug

46.5mm

46.5mm

Thickness

12.2mm

lowest

12.8mm

Water Resistance

300m

highest

200m

Power Reserve

42h

highest

40h

MSRP

$1,768

$370

lowest

Movement

Soprod M100

Orient F6722

Case

4 specs
Diameter
39mm
39.9mm
Thickness
12.2mm
12.8mm
Lug Width
n/a
20mm
Water Resistance
300m
200m

Crystal & Dial

3 specs
AR Coating
Yes
n/a
Dial Color
Enamel Black
Black
Lume
Super-LumiNova
None

Movement

7 specs
Caliber
Soprod M100
Orient F6722
Beat Rate
0 vph
21,600 vph
Power Reserve
42h
40h
Jewels
0
22
Hacking
No
Yes
Hand-winding
No
Yes
Complications
COSC
Date

Pricing

1 specs
MSRP
$1,768
$370
Keep your wishlist and collection together in the appExplore the app

Reviews

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, unique style, and smooth, confident bezel action with a useful dual scale. The winding, hacking, and crown action are reported to be working perfectly, and timekeeping is consistently good, with one owner noting it kept good time over eight months. Some owners find the crown to be comically large, though this is a minority view. Overall, owners rate the Serica Ref. 5303 Diving Chronometer highly for its wearability and distinctive design.

Orient AC0Q-40 Diver

Owners praise the Orient AC0Q-40 Diver Watch for its value, sapphire crystal, and durable build quality, with many appreciating the 39.9mm case size for its smaller, trendy appeal and the raw steel bezel for a vintage look. The bracelet features folded end links, and while the in-house automatic Orient F6722 movement is considered a good workhorse, the watch is not ISO certified for diving, though suitable for swimming. Unless a purple dial is specifically desired, other color options are recommended. On balance, owners rate the Orient AC0Q-40 Diver Watch highly for its appealing design and value proposition in a compact package.

Similar watches

Matched to the watches above on size, movement, style and price, microbrands first. Open any one to dig in.

DiscussionNot started

Also compared

Comparisons nearby in the catalog: alternatives to the watches above paired against the matchup.