Model Number: A1858, A1860, A1889, A1890

Storage: 8GB

Initial watchOS: watchOS 4.0

Latest watchOS: watchOS 8.8.1

Released: September 12 2017

Discontinued: September 7 2022

Weight:
- 26.7g (Aluminium GPS)
- 28.7g (Aluminium Cellular)
- 42.4g (Stainless Steel)
- 40.1g (Ceramic)

Chipset: Apple S3

RAM: 768MB

Display Specifications:
- 1.5" OLED Multi Touch Screen
- 340 x 272 display resolution at 290ppi

Colours:
- Space Grey
- Silver
- Gold
- Chrome

New Features:
- Faster Processor
- Improved Software Support
- Cellular
- Siri Voice

Model Number: A1859, A1861, A1891, A1892

Storage: 8GB

Initial watchOS: watchOS 4.0

Latest watchOS: watchOS 8.8.1

Released: September 12 2017

Discontinued: September 7 2022

Weight:
- 32.3g (Aluminium GPS)
- 34.9g (Aluminium Cellular)
- 52.8g (Stainless Steel)
- 46.4g (Ceramic)

Chipset: Apple S3

RAM: 768MB

Display Specifications:
- 1.65" OLED Multi Touch Screen
- 390 x 312 display resolution at 303ppi

Colours:
- Space Grey
- Silver
- Gold
- Chrome

New Features:
- Faster Processor
- Improved Software Support
- Cellular
- Siri Voice