---
title: "Rolex Sea-Dweller 43mm Steel & 18ct Yellow Gold Oyster 126603 2021"
type: "product"
brand: "Rolex"
model: "Sea-dweller"
reference: "126603"
price: 12295
currency: "GBP"
condition: "Pre-owned"
year: 2021
category: "Watches"
subcategory: "Rolex"
availability: "In Stock"
url: "https://thediamondbox.co.uk/rolex-sea-dweller-43mm-steel-yellow-gold-126603-2021"
image: "https://thediamondbox.co.uk/uploads/original_image/b438bf79e3f76c7eea003fdf924881d5.png"
updated: "2026-11-12"
---

# Rolex Sea-Dweller 43mm Steel & 18ct Yellow Gold Oyster 126603 2021

## Price

**£12,295** (Finance available from £1156.75/month)

## Description

This 2021 Rolex Sea-Dweller features a 43mm Oystersteel and 18ct yellow gold case paired with a matching two-tone Oyster bracelet. Its classic black dial features luminous hour markers, complemented by a black Cerachrom bezel, yellow gold detailing and a distinctive red Sea-Dweller inscription.Powered by the automatic Rolex Calibre 3235, this Sea-Dweller offers approximately 70 hours of power reserve. Its helium escape valve and impressive 1,220-metre water resistance reflect the collection's professional diving heritage.This watch has been checked against technical records to guarantee authenticity and clean history.Comes with original box and papers.Ref: 126603

## Specifications

| Specification | Value |
|---------------|-------|
| Brand | Rolex |
| Reference Number | 126603 |
| Year | 2021 |
| Condition | Pre-owned |
| Date on card | 18/04/2021 |
| Watchfinder condition rating | Very Good |
| Location | UK |
| Serial | N93891W5 |
| Model | Sea-dweller |
| Papers | Yes |
| Box | Authentic Box |
| Gender | Gents |
| TDB Limited Lifetime Warranty | Yes |
| Case Size | 43mm |
| Strap design | Oyster |
| Material | Steel & Yellow Gold |
| Bezel material | Ceramic |
| Dial Colour | Black |
| Movement | Automatic |
| Bracelet Size (cm) | 18 |
| Keywords | Rolex Sea Dweller, Rolex 126603, Rolex two tone Sea Dweller, Rolex Sea Dweller 43mm, Rolex gold steel Sea Dweller, Rolex Sea Dweller 2021 |

## About The Diamond Box

The Diamond Box is North London's distinguished destination for luxury watches and gold jewellery since 1997. Visit us at 114 Ballards Lane, N3 2DN, London or call 020 8838 3655.


[View this product on our website](https://thediamondbox.co.uk/rolex-sea-dweller-43mm-steel-yellow-gold-126603-2021)