Rear window heating?? 911S 1968

[egbert]

Hi everybody

Can anyone help me out with the following:

I have a rear window heating switch on the dash but only grey rear window tubes ( as in the pics) so no electric rear window heating?
And ,Is this the proper way to install the grey tubes??

rgds egbert from holland

[peekaboo]

Since you mention rear window heating/defog for early cars , I have been wondering about this unit. I see it on a good amount of 911's in 1968 & 69 at rallye (usually Factory entry cars) .

Here is one on Pauli Toivonen's car at the 1968 Monte Carlo , which was a factory entry:

Anyone know what manufacturer made this unit ? Was it a factory accessory ? I'm assuming it was attached to the inside of the glass versas embedded. Anyone know any details ?

No. 116 , Pauli Toivonen - Martti Tikkanen (2nd overall)

[Fritter]

Pretty sure that exposed clip on the back goes under the rubber window gasket and hooks over the edge of the window opening

[Cliff]

As per Brett Johnson`s PORSCHE 911/912 book,1967 -1968 911 (page 28) had an optional heated rear window with vertical heating elements.I have one and there are about 80 plus very fine/thin elements with a single stage dash mounted switch.....Cliff

[gulf908]

The demister on the rally car was an aftermarket item.
They were a very common addition on English cars of the era - cant remember the brand name though.

HTH
Dennis.

[Bobs 67S]

Izenglas

Used in cold climate to put a airspace between too clear surfaces and eliminate fogging of the window. The black line is a 1/8" thick rubber with adheasive. Real big item prior to adequate defrosting fans/heaters. This was much better than the Barclays card (twice as thick as a standard US credit card) used to scrape the INSIDE windows of VW 's and Porsches in the 1960's -70's.