Highsnob points us at these NATO straps made from selevdge denim, available on Style Forum. Not sure if this is the first NATO watch strap to be made from the highly coveted class of denim, nor should it be your last NATO strap (for those still working through their variants). Maybe overkill if you’re rocking selvedge ends on other garments. You have been warned.
Update: It’s actually nylon made to look like Denim. The warnings should still be heeded.