From what I have read and learned over the years, the option for a soft/foldable rear targa window ended in 1972. I do not know if any were actually manufactured in 1972. I have seen two 911's with that option that were manufactured in 1971. My Irish Green 911E was manufactured in November of 1969, to be sold in 1970. I've read that when asked how many were manufactured in 1969 and 1970, the factory says "only a handfulll." I'm not sure how many "a handful" is. Again, from what I've read a best guess is less than 100 manufactured with that option for those two years. Can't say about 1972.
Converting to a soft window targa would be quite a project. Carrara Charlie, a member of this BB, was in the process of converting his 911. His insight might be helpful!
The downside of owning a soft window targa:
1) Your car is less secure.
2) It takes you approximately 10 minutes to take the window down, cover both sides of the window with a cotton towel or flannel, and install the boot; or to remove the boot and the towels, zip the window back up and store the towels and the boot.
3) The sound level from the wind, the engine, and the exhaust note in the rear seats is approximately 115 db at 120 kph.
4) The soft rear window will leak a little onto your interior in a gentle rain. and
5) You will be the envy of every other Porsche 911 targa owner who sees your car!
The upside: I recently read that a 911 targa with the soft window option was worth approximately $3-5,000 more than a regular 911 targa.
Hope this helps! Rock
