Highest mileage Gaydon era Aston?

[Barnezy]

Dropped my car off today at a dealer for some post purchase work. When being given a lift in to town we obviously got in to a conversation about cars. We spoke about the huge prices the air cooled Porsches are going for now and he mentioned he'd seen one with 250k on it still going strong. He then made a comment that Aston engines could probably never get that high, so I'm interested to know what the highest mileage Gaydon era AM is, with the original engine?