Originally Posted by Allan G
As LAB said. If it only has one value, then this will be the continuous rating.

No, that wasn't what I said. A 1 1/4"/31mm glass fuse marked 35A can certainly be the blow rating.

The fuse rating can also be stamped on the metal end cap .

"These 35A fuses are marked according to the modern Lucas regime (metric / post decimalisation) system whereby the marked rating is the BLOW rating and the continuous rating is half that marked (17/17.5A (Amp) CONTINUOUS)"