help needed on fuses

[ZERO]

this pieces are not mine . but any ideea about them .......

[ZERO]

another one

[ZERO]

and the last.

[spotter]

Im sure ive found the last one for you in a manual with austro hungarian fuzes.The pictures you have the fuzes look to be a white metal (steel ?) is this just how the photos have come out ?
as the drawing says the fuze is bronze