[Moderator Omega - Wristscan]
While I don't have a Speedy yet, my favorite . . .
. . . (aside from a NASA-issued 105.012, of course!) would be the A.C.P. This example . . .
. . . was posted by Anotol a few years back.
Why the A.C.P.? Because the dial was made especially for a private group of auto enthusiasts in Peru. Our So Cal alphabet soup gang tried to persuade Omega to produce a Speedmaster especially for us with the Greek letters ⍶βɣ (alpha beta gang) where 'A.C.P.' appeared on the dial, below 'Professional', but to no avail. So we settled . . .
. . . for t-shirts instead.