I saw a picture from someone else who had done this, and realized I had a beads of rice bracelet from an old 60s Enicar watch in my box 'o straps, and decided to see if it would fit. I had to grind the end-pieces to 19 mm, but it was a pretty simple process. I'd rather have a 1039, but those have gotten WAY too expensive. So it's this for now, until I go back to wearing it on the leather NATO (see my avatar). Anyone else wear their Speedmaster on an unusual bracelet? (and I don't consider the 60s JB Champion bracelets unusual. Sorry).