10,000 rpm Tachometer, p/n 901.741.302.06 as used on the 1967 Porsche 911R - Photo 6
...Note the mounting screws in back of this 1967 Porsche 911R 10k VDO gauge as it was the method of attachment used for this instrument up until 1969.
Starting 1970, Porsche changed to a "rubber compression-ring" that slips over the gauge can and then slips into the dash (as used on the 1970 Porsche 914-6 GT)...
