I've just received the key for a Signature ISIS that I purchased a couple of weeks ago and it is completely different to my original ISIS key that was received late 2007:
Original key on the left, new key on the right. I remember reading of a problem with the Cornwall pyramid being withdrawn for fitting of a new lock. I'm no locksmith but these keys appear totally incompatible so which one actually fits the pyramids ?
Also I understood the keys to be an integral part of ISIS V, so how is that going to work if there are two versions in circulation ?