Approximately what year did Victorinox start making knives with red plastic scales

[Jessero]

Approximately what year did Victorinox start making knives with red plastic scales? Just wondering, sorry if this is obvious, i couldnt find the answer searching google...

 

[Piso Mojado]

1937

http://www.sakhome.com/304372154

 

[Jessero]

1937

http://www.sakhome.com/304372154

Awesome, thank you and thanks for the link!

I figured it was in like the 50s or 60s that they started making the red ones...