Pretty much any NATO out there will accommodate two watches depending on the size of the watches as well as your wrist. The NATOs without the metal keepers (on the left pictured below) allow for better positioning regarding two watches on the same NATO. All NATOs pictured below came from www.cheapestnatostraps.com...
From what I understand, they're called original NATOs...I believe the Zulu straps have larger more oval metal keepers. I may be incorrect on this.
Drove down to San Diego for the long weekend, taking it in as I haven't been here since before there were cell phones.... it's way better than the Bay Area
Feelin' kinda 'Speedy' tonight, not sure exactly why, and I'm not sure EXACTLY which one to wear..... Mighta been the coffee... I guess I'll wear this one: