This is when https://www.pnhwx.co.uk Blancpain introduced one of its most iconic versions of the Fifty Fathoms https://www.rmwx.co.uk/Collection/rm-05/ – the "No Radiation" dial variant. The watch was designed to clearly identify that the dial wasn't using radioactive materials for its lume. And how did it communicate that? By including a large colorful stamp, in yellow and red, with lines crossing through the https://www.rmwx.co.uk/Collection/rm-01/ radiation trefoil symbol, reading "No Radiations." Pretty clear.