It uses a triple layer design with 2 new proprietary componentsAnd a partridge in a pear tree.
Outstanding thanks for the insight.
This is all fusers need to know.
All potential fusers need to remember that fuses deteriorate with age from switch on surges (as pictured), and they just need to be replaced with good quality $2 fuse of the same value, as Almarg linked to.
https://i.stack.imgur.com/0uqWX.jpg
http://www.digikey.com/products/en/circuit-protection/fuses/139
Cheers George