You might find this thread interesting both for the photo and the potential contacts.
http://www.early911sregistry.org/forum/showthread.php?t=13517&highlight=knobs
The picture of the '67 on this thread clearly has the right knob ID'd as a warning flasher. That could leave the other two to be fog lights and rear defroster. Interestingly, the knobs don't quite sync up with yours.
I'd PM Alan and see if he can clarify it for you.
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'73 914 2.0, '74 911 Coupe, '74 911 Targa
'78 924, '84 944, '86 944 Turbo, '84 911 Coupe
'84 944 (current), '96 993 Coupe (current)
'73 911T Coupe (current)
'88 930S M505 (current)
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