A lady's "pocket watch", but it's more like a flip-top wrist-watch. No matter what it's called, I would totally wear it. :D
Anno 2070: Eco buildings, Tobias Frank on ArtStation at https://www.artstation.com/artwork/r5me
ArtStation - Xandar city - circular building, Gaelle Seguillon
John Berkey, maybe? Retro future drawing
John Berkey scientific fiction illustration
alien city by cory jespersen | 2D | CGSociety
Wang Rui - Helsinki station. Our tips for things to do in Helsinki: http://www.europealacarte.co.uk/blog/2011/08/15/what-to-do-helsinki/
Driving the future.