Side by side

Serica Ref. 5303 Diving ChronometervsLongines LEGEND DIVER

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
LEGEND DIVER
LonginesLEGEND DIVER
MSRP $3,850

At a glance

16 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
LEGEND DIVER39mm
Power Reserve
Ref. 5303 Diving Chronometer42h
LEGEND DIVER72h
Water Resistance
Ref. 5303 Diving Chronometer300m
LEGEND DIVER300m
MSRP
Ref. 5303 Diving Chronometer$1,768
LEGEND DIVER$3,850

Full specifications

Case

4 specs
Thickness
12.2mm
12.7mm
Lug-to-Lug
46.5mm
47mm
Finish
Brushed and polished
Caseback
Solid
Screw-down case back

Crystal & Dial

4 specs
Crystal Shape
Flat
AR Coating
Yes
Both sides
Dial Color
Enamel Black
White
Indices
Applied
Painted Arabic numerals and indexes

Movement

7 specs
Caliber
M100 COSC
L888.6
Beat Rate
28,800 vph
25,200 vph
Power Reserve
42h
72h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
COSC
Hours, minutes, seconds

Pricing

1 specs
MSRP
$1,768
$3,850

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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.

Longines LEGEND DIVER

Owners widely praise the Longines LEGEND DIVER for its faithful retro design, often calling it one of the best vintage reissues, with the 39mm variant lauded for its perfect size and the 42mm for its versatility. The watch is consistently noted as ISO 6425 compliant and powered by the COSC-certified L888.6 movement with a 72-hour power reserve. Reviewers highlight its sophisticated look, clean no-date dial, and the well-made beads-of-rice bracelet, though some owners find the polished center links or overall polished finish dressier than expected for a diver. Owners are split on the 39mm's bracelet, with one finding it too "blingy" and another praising its comfort. The 42mm version's 50mm lug-to-lug measurement is considered long by some, while others find it comfortable. One owner of the 42mm model reported a scratched hour hand after 15 years, and another noted the original leather strap's poor quality.

From video reviewers

The Longines LEGEND DIVER features a unique blend of vintage design and modern functionality, with 300 meters of water resistance and a 72-hour power reserve. The watch's historical significance and aesthetic appeal are notable strengths. The 7-link bracelet is also a notable feature, although its quality and comfort are not explicitly discussed.

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