Zac Hall at 9to5Mac, writing on the weird history of the use of gold and gold finishes when it comes to the Apple Watch:
Apple Watch has a curvy history with the color gold and accompanying straps. The original 18K gold Apple Watch Edition paired with a range of straps before being discontinued. Aluminum models have included three shades of gold (rose gold, gold, and “new” gold) with Sport and (now discontinued) Woven Nylon bands using gold hardware. Gold variations aren’t sold separately either which makes them somewhat rare.
Apple Watch Series 4 comes in two flavors of gold — aluminum and new stainless steel — but the gold band variety is still limited. While there are few perfect matches, these are some of my favorite pairings.