IXDAOJD-01
Homage to the Serica 5303 Chronomètre de Plongée
about$279
Regular price at the brand's own website, checked 31 Oct 2026. Marketplace prices change often.
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The IXDAO JD-01 is a homage to the Serica 5303 Chronomètre de Plongée, with a 40 mm case, 1 mm larger. It uses an automatic movement and is water resistant to 200 m. Its Resemblance Score is 70 out of 100. It costs about $279 at the official store.
Side by side with the original
Compared with reference 5303-1. Values marked ≈ are estimates, such as a reviewer's measurement.
| Spec | JD-01 | 5303 (5303-1) | Difference |
|---|---|---|---|
| Case diameter | 40 mm | 39 mm | +1 mm |
| Lug-to-lug | 48 mm | 46.5 mm | +1.5 mm |
| Thickness | 12.6 mm | 12.2 mm | +0.4 mm |
| Lug width | 20 mm | 20 mm | same |
| Water resistance | 200 m | 300 m | |
| Movement | Automatic, PT5000 | Automatic, SoProd M100 | |
| Power reserve | 42 h | 42 h | |
| Crystal | Sapphire, anti-reflective and anti-fingerprint coatings | Sapphire, inner face | |
| Bezel | Rotating, 120 clicks, with a luminous sapphire pip, Ceramic | Double graduation: 60 minutes, 12 hours, 15-minute countdown, Ceramic, polished | |
| Case material | 316L stainless steel | 316L stainless steel | |
| Lume | Swiss Super-LumiNova C3 Grade A, with BGW-9 also listed on the black-dial listings | Super-LumiNova C3, green glow | |
| Bracelet | 316L stainless steel mesh bracelet, 20 mm tapering to 16 mm | Vesper Mesh, woven steel with integrated end pieces | |
| Weight | Not published | Not published |
The original
Serica
5303
Reference 5303-1, 5303-1, black dial, black enamel ceramic bezel
- Case
- 39 mm
- Lug-to-lug
- 46.5 mm
- Thickness
- 12.2 mm
- Water resistance
- 300 m
- Movement
- Automatic, SoProd M100
- List price
- Not published
Why it scores 70
Proportions and movement are computed from specs. Design details and functions are judged from the brand's official images. How we score
Proportions20.7 / 30
- Case diameter8 / 121 mm apart
- Lug-to-lug3.5 / 81.5 mm apart
- Thickness5.2 / 60.4 mm apart
- Lug width4 / 4Same size
Design signatures27.5 / 40
- Lyre-shaped lugs5 / 10Angled official shots show lugs that sweep down with a polished facet between brushed surfaces; one reviewer calls them twisted. The lyre curve itself cannot be confirmed from the angled images, so this is partial.
- Ceramic bezel with minute, 12-hour and 15-minute countdown scales5 / 10Ceramic bezel with a minutes ring and an inner steel-look ring with 12-hour numerals, marked MINUTES and HEURES; no 15-minute countdown scale is visible.
- Double-domed sapphire crystal7 / 7The brand lists a double-domed sapphire crystal with a clear AR coating, and the crystal edge curves visibly in the images.
- Woven steel mesh bracelet with integrated end pieces8 / 8Woven steel mesh bracelet with integrated end pieces, tapering from 20 mm to 16 mm.
- Domed luminous hour indices2.5 / 5Round and rectangular lume indices that look raised in the images, but the brand lists printed lume (extra thick) rather than applied domed markers.
Functions and materials12 / 20
- Complications4 / 8Time and date; the original has no date window. Both have a centre seconds hand.
- Bezel action2 / 4Brand lists a 120-click rotating bezel; the original's record does not state its click count or direction, so the match cannot be confirmed.
- Case and bezel materials4 / 4316L steel case with a ceramic bezel insert, as on the original.
- Crystal shape and date window2 / 4Domed sapphire like the original, but with a date window added.
Movement type10 / 10
- Movement type10 / 10Same movement type.
What reviewers and owners say
Reviewers
From 8 reviews we read or watched.
Reviewers liked the finish and the design, and two found the printed lume very good for a printed dial. The brushed and polished lugs, the mesh bracelet with its clasp, the clear dial print and the strong C3 lume were praised, and the watch was found compact and comfortable on 6.2 to 7.5 inch wrists. They describe the design as following the Serica 5303, with a date window added and a more common automatic movement in place of the original's. One reviewer noted that the original also has a sterile dial, which is why the IXDAO looks so close to it.
Four of the eight reviewers found a bezel alignment fault, in different places: one click off, off at 6 o'clock, the 3 o'clock markers sitting slightly low, and the lume pip a hair right of 12; two others found their bezel lined up. Two found the PT5000 gritty or stiff when winding, while two others ran it with no winding trouble, and hacking and hand winding worked on both of their units. One reviewer measured 38.8 mm across with calipers against the brand's 40 mm, while another got 40 mm. The mesh bracelet was described as slippery and, on a loose fit, as pulling arm hair.
Good
- Finishing on the lugs and case is praised by reviewers
- Mesh bracelet with a signed clasp
- Strong Super-LumiNova C3 lume
- 120-click bezel with minute and 12-hour scales
- Double-domed sapphire crystal
- Four colourways and three movement options
- Crystal and the lume pip tested as sapphire by one reviewer; the crystal by another
Less good
- Bezel alignment off by a click or a marker on four reviewed units
- PT5000 winding felt stiff or gritty to two reviewers
- Date window added, which the original does not have
- Smooth mesh bracelet can slip on the wrist
- Lume is printed, not applied
Known quality issues
Each reported by at least two independent sources.
- The bezel or its markers are slightly out of line: one reviewer's bezel was one click off 12, another found a misalignment at 6 o'clock, a third found the 3 o'clock and 15-minute markers slightly low against the dial, and a fourth had the lume pip sitting a hair right of 12.
- The PT5000 winding feels gritty to one reviewer, and another found the crown becomes hard to turn after a few turns of hand winding.
Versions and colours
- Black dial, black ceramic bezelFollows the 5303 5303-1 (5303-1, black dial, black enamel ceramic bezel)about $279
- Black dial, blue ceramic bezelIts own colourway, not on the originalabout $279
- White dial, black ceramic bezelFollows the 5303 5303-2 (5303-2, white porcelain dial, black ceramic bezel)about $279
- White dial, blue ceramic bezelIts own colourway, not on the originalabout $279
Sources
Checked 31 Oct 2026. Every figure on this page comes from one of these pages.