C-H, are those diazed fuses common in some areas of Europe? Diazed fuses have been periodically discussed in this “Non-US…” E-C.net forum.

{For the benefit of US electricians, they are somewhat like local edison-based fuses, but are rated 1-63 amperes. They are closer in design to the US "type-S" fuse, in that you can't cheat by putting a bypassing penny in the shell base.}