Folks,
The light on my vintage Blaupunkt Frankfurt radio went dark and I couldn't see $HIT. So I searched high and low and finally found the bulbs from Germany and bought 5. I have 4 spares to help other members who have Blaupunkt Frankfurts in their cars and anticipate the bulb needing replacement at some point. Mine appeared original and very dirty. The new bulb is great and identical to the original. To get to the bulb, you'll need to undo the four 5.5mm bolts on the front face, move the needle all the way to the corner, remove the front faceplate and replace the bulb. To replace the bulb, push the bulb in and tilt it upwards as you release it. Took me about 15min and a pint of cold beer. Now the bulb might fit other vintage Blaupunkt radios, I wouldn't know because I don't own other vintage radios so don't bother asking me
Happy Motoring,
Eamon