The humble Casio calculator watch from the 1980s is back in fashion but somewhat hard to track down. So here is where you can get them.

The black version is pretty much available anywhere. While it’s still pretty cool, it’s the Poptones you want – green, white, gold and more that bring the 1980s classic into the modern day. A few lucky people have found them in Myers for around the $100 mark, but you can get them online too, mainly in white and gold. The green is now notoriously hard to grab.

With an awesome calculator, data bank, and retro cool points that will keep you squarly in the “awesome” category of people, there is no reason not to attach one to your arm.

White: ASOS
Silver: Surfstitch
Gold: Sufstitch