I thought the essential difference is that Y68 is copper and Y68a is brass.
Yours looks like copper to me - I have one and it looks the same colour as yours and it's definitely copper.
What is the weight and diameter ( as well as thickness) ?
Yours looks like copper to me - I have one and it looks the same colour as yours and it's definitely copper.
What is the weight and diameter ( as well as thickness) ?





















