The Apple Watch Edition 38mm (1stgen) was announced in 2014, September. Released 2015, July With 1.5 inches Retina OLED, 450 nits (peak), Powered by Apple S1 (28 nm) and running watchOS 1.0, upgradable to 4.3.2, the device delivered smooth performance and multitasking capabilities. while the Li-Ion 205 mAh (0.78 Wh), non-removable ensured long-lasting usage.