parts for what?

[gringo]

a friend showed up with this the other day...had been run over and thrown in a tool box for years...what is it?
solid aluminum, milled then plated, suggests a fine piece at one time? is it german? a paratrooper? i thought it was a gravity knife, but wear patterns suggest a more forceful exit of the blade...

is it worth fixing? perhaps for the practice...scales is not a big deal... welding the one side back together is not a real issue...but what parts went into the trigger? what type of spring?

duh?

[muskrat man]

that looks like an italian version of the american "slider" most commonly used is the USA as an advertising knife, looks like the button/spring mechanism is missing, probably broke off and/or lost over the years here is an american slider I did for Singin46

[gringo]

thanks muskrat...