[Hostage]

There was no colored chalk in 1917? Really?

[Mr. Jeeves]

The poster means the whole world was black and white back then. It’s true - I’ve seen the films. :)

[Don W]

It’s a joke reference to a “Calvin and Hobbes” cartoon where Calvin’s father tells the brat that there was no colour in the world until 1954.

Yet we wonder why Calvin was such a handful < BG >

[windcliff]

Did a Google search and it says it was invented in the 1800’s.

[Fai Mao]

“There was no colored chalk in 1917? Really?”

This is an oblique reference to a Calvin and Hob cartoon where Calvin’s father explains that old TV shows are in B&W because there was no color until 1970.

I looked for a link the strip but couldn’t find it. IT is one of the funniest things you will ever read