To be fair, it was a fairly cheap watch to start with...
Anyway, I needed a quick and easy solution to my 'lack of watch strap' problem so I decided to make a replacement. If you, too, wish to make a replacement watch strap, here's what you'll need:
Two pieces of scrap material (long enough to go around your wrist one and a half times. One will be the top fabric, one will be the lining)
Matching or contrasting thread
Optional interfacing (I made mine without)
Mine has single button closure, but feel free to add as many buttons as you can fit on the thing! Or even make the strap adjustable by adding button holes at even spaced intervals along the strap.
Decide how wide you want the wristband to be. I wanted mine to be more of a cuff so I made it about 2 inches wide, excluding seam allowance.
Pin the top fabric scrap to the lining fabric scrap and draw a rectangle the length and width of your measurements adding a 5 mm (or 1/4 inch) seam allowance.
Cut out both pieces together. (N.B. If you are using interfacing, this is the time to add it to the wrong side of the lining fabric.)