The watch comes with both a https://aphorismsgalore.com/users/farielmaleahv link dark grey calfskin leather strap and a slate grey calfskin strap, both embossed with a textile pattern.As you probably figured out from the caseback https://www.vhei.eu/members/vidoniaa40/profile/ link engraving, the Royal Oak Concept Tourbillon "Companion" is a limited edition of 250 pieces https://marketplace.deals/user/hadarakittyv/ link and retails at 200,000 CHF.