Before it was known as the Moonwatch, the Speedmaster was known for its use as a lap timer. The Omega Speedmaster Porsche Club of America Watch celebrates this heritage with a number of race-inspired details. Its 44.25 mm case is made from polished and brushed gray ceramic, which recalls high-performance brake discs as the yellow details recall the calipers. Its dial is made from Grade 5 titanium, which references both the moon and the exhaust of the 911 Turbo, and its Calibre 9300 is visible behind the PCA logo on the sapphire-crystal case back. Set on a gray leather driver's strap with yellow contrast stitching and micro perforations that reveal the yellow rubber lining, it's limited to just 99 examples.