Received my straps from Kizzi, straps are lovely quality and Kizzi is great to deal with The 321 is on the 'Apollo era' velcro strap and the X-33 is on the 'mil spec' velcro - you can see the vintage velcro is softer but both are equally as comfortable to wear
On this nice Sunday I'm wearing a vintage Omega Chronostop Genève (on the inside of my wrist, as you should).