Originally Posted by
Gilbert321
They [celluloid mudguards] did burst into flame. I set my dad's bike on fire as a kid and for the next 58 years of her life, my mum never stopped reminding me of it.
That's right. I'm not sure if Bluemels changed from celluloid to plastic for safety or cost reasons, nor when the change occurred. They were certainly still using celluloid in the 1940s.