All The new Speedmaster Chronoscope variants in stainless-steel is often matched to both a steel bracelet or possibly a leather strap. That asymmetrical design, with the extra scenario substance on the best side performing as crown guards, has remained a signature in the Speedmaster since 1964. All Moonwatches, from 1969 https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/