I googled the patent number and found the following info. The figures on the patent sketches looks slightly different than the piece. Patent number: US 3497806
Quantity one Tektronix (Tek) Black 5" Ground or VLOW Sense Lead For P64xx Series Probes, NOS, in excellent condition and essentially unused. Circuit connection is via a #6-32 threaded Pomona Hook Tip. Since the lead is #6-32 threaded you can replace it with a standard Tektronix 344-0046-01 scope probe threaded insulated alligator ground clip as desired.
Quantity one Tektronix (Tek) Green 5" Ground or VHIGH Sense Lead For P64xx Series Probes, NOS, in excellent condition and essentially unused. Circuit connection is via a #6-32 threaded Pomona Hook Tip. Since the lead is #6-32 threaded you can replace it with a standard Tektronix 344-0046-01 scope probe threaded insulated alligator ground clip as desired.
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