Other examples
From the car posted in - Feb 65 San Jose C Code Convertible - Unrestored Picture Thread. Likely a Feb built car and appears to have blue horn wires.
Can't read it other than make out the makers logo
5R07T178xxx Not really legible. For viewers the purple arrow points out a non-factory wire that had been added. Guess we should have thought to save this one.
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5F07A2706xxx - Looks like yellow horn wires - Members car
5F08C272xxx - Has yellow horn wires
Another illegible example. This time from 5F09C38xxxx
5F07T6286xx -
5F07C7806xx - Blue horn wiring - Members car