Thanks for the photos. Looks original to me, with the possible exception of the bracelet. Are you sure this is from 1968? The Tudor emblem on the bracelet didn't appear until 1971, to my knowledge. So, assuming it is a 7021 (you'd need to check between the
lugs for the numbers), I'd guess the bracelet was fitted later. I could still imagine you might find someone willing to pay £2000. Good luck.