Hi,
The most comprehensive site for pictures of the Type 3 tachometer options anywhere is at:
http://neil.us/type3/tach/ as per PurpleT3.
This site shows several different versions of the VDO Type 3 tachos. The commoner one in Australia is the Black face tacho made by VDO Australia and matches our 1972 + gauges. It reads to 6000 RPM, with the numbers 0- 6 printed on the clear plastic face, has a white needle and black bezel.
The T3 clock / tacho gauge diameter is 85mm so the Porsche Tachos of any model Don't fit, but with adjustment of the bezel the 914 tach will fit into early Type 1 ghias to replace the clock..
You can find several versions of the aftermarket Cockpit series VDO tacho which are still being made ( also black face and reads either 6000, 7000, 8000 or 10,000 RPM, and has a yellow needle and an adjustable red line pointer ) which is 80mm diameter and will fit, these come up on Ebay regularly. There are also a few other newer aftermarket VDO tachos which are about 85mm but they are also black faced.
I am still looking for an Original Type 3 grey VDO tachometer to buy after several years. Does anyone know if there are any in Australia ?? Cheers.