Doxa SUB 300 Searambler 42.5 mm
Brand: Doxa
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- Genuine product, certified by our jewelry store
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- Genoese jewelers since 1950







Prices on this site include Italian VAT at 22%. If your delivery address is outside the European Union, that VAT is removed at checkout — the price you pay drops accordingly. Import duties or local taxes may be charged on arrival by your country.
Within the EU you pay the VAT of your own country, worked out at checkout.
The Doxa SUB 300 Searambler is the silver-dial reading of the SUB 300 collection. Stainless Steel case of 42.5 mm, choice of stainless steel or rubber, sapphire crystal, water resistant to 30 ATM (300 m).
The movement is Swiss automatic with about 38 hours of power reserve. The unidirectional rotating bezel carries DOXA's patented no-decompression table: the mark that has identified a SUB for sixty years.
Technical data
| Reference | 821.10.021.10 · 821.10.021.20 |
|---|---|
| Collection | SUB 300 |
| Dial | Searambler — silver |
| Case | Stainless Steel |
| Diameter | 42.5 × 45 mm |
| Thickness | 13.4 mm |
| Crystal | Sapphire crystal |
| Movement | Swiss mechanical automatic, self-winding |
| Power reserve | 38 hours |
| Frequency | 28,800 A/h |
| Water resistance | 30 ATM (300 m) |
| Lug width | 20 mm |
| Strap | choice of stainless steel or rubber |
Frequently asked questions
Can it be used for real diving?
The stated water resistance is 30 ATM (300 m). The decompression bezel is the model's signature, not the tool you plan a dive with: for that you use a dive computer.
How long does it run if I don't wear it?
About 38 hours. Left still beyond that it stops: wind it from the crown or put it back on.
Why is the dial that color?
DOXA dial names are a house language: Professional is the orange born in 1967 because underwater it is the color you can read longest, Sharkhunter black, Searambler silver, Divingstar yellow, Caribbean blue.
Can I change the strap?
Yes: the lug width is 20 mm, so any strap or bracelet in that size fits. We fit it for you in the shop.
Do you ship to the United States?
Yes, worldwide, insured and tracked. For a delivery outside the European Union the Italian VAT is removed at checkout; duty and import tax in the destination country are the buyer's.
What warranty does it carry?
The DOXA international warranty, with the certificate filled in and stamped by us: Cicala Gioiellerie is an authorised DOXA retailer.
| Strap | Rubber, Stainless steel |
|---|---|
| Gender | Unisex |
| Case material | Stainless steel |
| Movement | Automatic |
| Crystal | Sapphire |
| Case diameter | 42.5 mm |
| Lug size | 20 |
| Power reserve | Power reserve of 38 hours |
| Water resistance | 30 ATM (300 m) |
| Dial colour | Silver |
| Movement functions | Date |
| Case diameter range | Over 42 mm |
About Doxa
DOXA, Swiss house from Le Locle since 1889: in 1967 the SUB 300 with its orange dial and no-decompression bezel. SUB 300T, SUB 300, SUB 300 Ti5, SUB 600T. Official retailer in Genoa, Italy.
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