The Caliper Slide Rule Watch will help you multiply and divide in the coming end times


When the apocalypse finally arrives, those with the booksmarts will be the upperymen. Maybe somebody you know will be the readerwriter and maybe somebody you know will learn how to make the brandywine and maybe you’ll have a bakerman among you but who will be the mather?

The mather will be the one with the Slide Rule watch from Caliper, and friends, the mather can be you. This mechanical watch runs a Miyota 82S0 automatic movement and features a unique slide rule bezel that lets you multiply and divide even if all electric everywhere goes dead shapes and you and your tribe have to hide from the Face Eaters in an old mall.

How does it work? To multiply, for example, align the first number to the first arrow and “find the second number on the same ring as the arrow and read across to find the result.” Division is a similar process. Caliper has outlined the instructions here and the watch can also manage currency and unit conversions.