I have to say, I tried a lot of straps with the TTP65, and finally seem to have landed on the "original" Tropic, as well.
The 1965 (vintage or tribute) is easier to match with a wide range of straps, I think, so the task was not as difficult as with the 1968. You are right, that aged lume patina creates a challenge. But the Tropic just seems to work the best and makes the watch perfect for summer and water.
I have not worn this watch in several weeks myself -- but I have been missing it, so this weekend that will change.
Best,
respo