I just bought the silver ones off EBAY - 10 bucks a pair from a guy in germany - the silver one looks cleaner, not the 'fried egg' look. It also lights up more orange - the orange one had been in for a few years and it always seemed too white, when I removed it I found the orange coating on the bulb had cracked/melted and was largely ineffective it allowed the white light to escape and the result was it gave a orange tint to a white light whereas the silver coated bulb lights up the entire reflector orange ... if that makes any sense.

One down side is that the silver bulb appears dimmer then the orange one - this may just be a factor of the orange coating wearing off and allowing more light out I'm not sure - still plenty of light on the silver one to be noticed as a signal though.

My son broke a bulb - the bulb has orange glass with a silver reflective coating.

I received 1156 rear bulbs - I need to order some front ones - I think he has them in stock too - only took about a week - if you can't find it on ebay, need his email or if you want some pics - drop me a line (I'm only intermittently checking the board). Right now the car has one orange bulb and one silver one so it may give you an idea if you are interested

regards

jeff
91 535ia