| Navy | The Royal Navy |
| Type | Motor Gun Boat |
| Class | Camper&Nicholson-type |
| Pennant | MGB 503 |
| Built by | Camper & Nicholsons Ltd. (Gosport, England, U.K.) |
| Ordered | 24 Apr 1942 |
| Laid down | |
| Launched | |
| Commissioned | 25 Mar 1943 |
| End service | |
| History | Renamed MGB 2003 in 1945 |
We don't have any commands listed for HMS MGB 503 (MGB 503)
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