Amazon.com: A1579 Battery Replacement Compatible with Apple Watch Series 1 42mm A1554 A1579 A1803 with Repair Tool Set + Installation Instruction + Back Cover Adhesive : Cell Phones & Accessories
Amazon.com: oGoDeal A1579 Battery Replacement for Apple Watch Series 1 42 MM A1803 and (1St Generation) Apple Watch Sport A1554 & 7000 Series with Repair Tool Kit : Cell Phones & Accessories
Identify your Apple Watch - Apple Support
Amazon.com: UHB for Apple Watch Series 1 Iwatch 1st Aluminum 42mm LCD Display Screen Replacement,for Iwatch 1 A1803 A1554 42mm Display LCD Panel Repair with Screen Protector(LCD with Touch)+Tools (42mm) : Cell
Amazon.com: SWARK Front LED Glass Lens Replacement Compatible with Apple Watch Series 1 42mm Sport Version A1758 A1554 A1803 (1st Generation) (No LCD Screen and Touch Digitizer) with Repair Kit : Cell
Apple Watch Sport 42mm (1st gen) - Full phone specifications
Apple Watch Sport (1st generation) - Technical Specifications