Vintage electrical circuit test probes RCA WG-299E&Safe-T-Probe

Lot of two old, 1950s vintage, test probes for electrical or electronic circuits. There is an RCA probe for AC or DC ohms. It is marked model WG-299E and has a threaded connector for attaching it to an ohmmeter. There is also a Safe-T-Probe made by K-G Electronics Corporation, Chicago 14, Illinois. We think this probe is for testing the there isn't live current in electrical circuits and components while working on them.

These are from the estate of an electrical engineer and have some age and wear.