Have a look at these:
http://www.ebay.com/itm/Volkswagen-Beetle-Classic-/141838538907?forcerrptr=true&hash=item21063c589b:g:~9cAAOSw5ZBWIWC6&item=141838538907
they’re similar to yours, Den. If you need turn signal lenses and couldn’t get original, they’ll do nicely. Later versions had an amber lens as on the 15/6. It’s too bad that the picture of the 15/6 can’t be blown up, at least I don’t know how to do it. I’ve seen these lenses used on old Mercedes quite often as correct turn signals for those are unobtanium.