[Herald1360]

First four pics show assorted record player cartridges (the stylus + transducer unit that converts the record groove wiggles into an electrical signal). Some may be relatively valuable, if they still work- certain types "go off" with just age, even if unused. Someone will probably be able to give you chapter and verse on types etc.

The last pic is a small pushbutton switch module. The button would click into place on the shaft when it's assembled into a unit. Not particularly interesting unless it's an unobtanium spare for an valuable old set.

Keep the pics coming, you might find something really obscure!