So here's an odd fish! A very original looking 1980 6309-7049 with what looks to be an earlier 7040 dial (or a very original looking 6309-7040 with what looks to be a later 7049 caseback). [Edit: turns out I was totally wrong on this! See below.]
Bought this off a seller who told me he was given it by his father, who bought the watch new at Leeds jewellers in Florida around September of 1980. His father was in a serious motorcycle accident in the mid-80s which broke the crystal, which was replaced at that time, and the watch was stored in '91 with no further servicing.
Now obviously I just have his word for all the above, but apart from the fact that he seems totally straight-up, the seller gave me a fair price, has offered a no quibble refund, and only told me any of the above after I had already bought the watch, so I'm very much inclined to believe him.
Were any 7049s made with the pictured dial? My only other theory is that the dial was replaced with the crystal, but why a US jeweller would be using a deep bevelled 7040 suwa dial, and furthermore not tell the client about the replacement I have no idea! Any theories? (It seems way too nice and unrefinished to be a puppy-mill watch, BTW - I should know as I started my collection with a couple, since departed!)