FIFA World Cup Russia 2018 Sticker Collection
There are at least four variations in the back design for this collection.
UPDATE (15-04-2018 19:17): Scans of the backs of the Swiss Gold Edition stickers added, thanks to Ivica Dodig.
International - Black back
South America - 670 stickers version - Pink back
USA - Black back "Printed in USA" (Sticker sheet inside album)
McDonalds - No Number (40 stickers only)
Switzerland - Gold Edition