Inside Apple Watch Series 2: 2015 vs 2016 models

The original Apple Watch was released in April 2015. Apple has since released the Apple Watch Series 2 and replaced its original watch line with the Series 1 watches.
The Series 1 is identical to the original watch, but features a S1P dual-core processor and new colour options - excluding the Ceramic Apple Watch Edition.
The new Series 2 is water resistant up to 50m, has a built-in GPS, has new colour options, has a dual-core S2 processor and a brighter display.
Read on to see how these components are arranged within its chassis. Also see: Apple Watch 2 release date, UK price and specs