Did your strap loop finally break off? So did mine. So I made this, in as close of an approximation as I could. It even has the little retaining clip to keep it from slipping from its spot. I've been wearing mine for a while and it's held up well to everything. The split in the picture is from me not properly tuning this filament at the time and it doesn't effect its performance so I haven't reprinted it. My specific watch is the Instinct 2.

There's a small gap on one side that allows you to slip it into place. I used a solder iron to weld it together with no issues.

-Elegoo 95A TPU
-Recommended to use a lot of walls so no infill is present
-The tab needs support