Cadisen C8180
The Cadisen C8180 is a homage to the Audemars Piguet Royal Oak (ref 15500ST). It is 42mm across, runs an Automatic (Seiko NH35A) and is rated to 100m. It scores 75/100 on our published fidelity rubric, ranked 3 of 4 among the Royal Oak homages we list.
Specs last checked 2026-10-02.
No Amazon US listing carrying the exact Cadisen C8180 reference was confirmed, so this page links no Amazon search: a search for it on 2026-10-11 did not show this reference.
Cadisen C8180 specifications
| Brand | Cadisen |
| Reference | C8180 |
| Movement | Automatic (Seiko NH35A) |
| Case diameter | 42mm |
| Water resistance | 100m |
| Homage to | Audemars Piguet Royal Oak (ref 15500ST) |
| Fidelity | 75/100 (rubric) |
| Specs checked | 2026-10-02, against Cadisen’s own product page or the listing named in the notes below |
Crystal and lug width are given only where the notes below name them; we do not fill a spec we have not checked.
Cadisen C8180 against the Audemars Piguet Royal Oak
The Audemars Piguet Royal Oak (ref 15500ST) is 41mm, rated to 50m, with an Automatic (AP 4302). The C8180 is 1mm larger than the original’s 41mm, rated to 100m, with an Automatic (Seiko NH35A). The design cues the original is known for: octagonal bezel, tapisserie dial, integrated bracelet, exposed screws.
Our notes on the C8180
The cheapest way into the octagonal-bezel look with a real Seiko automatic and an exhibition caseback; wears a full 42mm against the original's 41mm and the stamped waffle dial is a step behind Pagani's finishing, but 100m of water resistance is double what the original offers.
Other Royal Oak homages
- San Martin SN013-G: fidelity 83/100, 38.5mm, Automatic (Miyota 9015)
- Pagani Design PD-1673: fidelity 78/100, 40mm, Automatic (Miyota 8215 or Seiko NH35)
- Tissot PRX 40mm (T137.407.11.051.01): fidelity 62/100, 40mm, Swiss automatic (Powermatic 80)
The full ranking, with notes on each: Royal Oak homages, ranked by fidelity.
More on Cadisen: Cadisen watches review · Cadisen C8053
FAQ
What is the Cadisen C8180 a homage to?
The Audemars Piguet Royal Oak (ref 15500ST). It scores 75/100 on wristhomage's published fidelity rubric, ranked 3 of 4 among the Royal Oak homages listed.
What movement is in the Cadisen C8180?
An Automatic (Seiko NH35A), per our check on 2026-10-02.
How big is the Cadisen C8180?
42mm across, 1mm larger than the original’s 41mm, with 100m of water resistance.