Amazon.com: MacBook 12 Inch Plastic Hard Shell Case & A1534 Silicon Keyboard Cover A1534 MacBook Air 12 Inch Case Compatible MacBook 12 Inch Retina A1534 (Newest Version 2017/2016/2015) (Notebook Pattern-Black) : Electronics
2015 vs. 2017 12" MacBook with Retina display - YouTube
Apple Adds 2015 12-Inch Retina MacBook to Vintage Products List - MacRumors