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There is a set of numbers moulded into the trunklid by the locking mechanism. I have been taking pics of mine and others I have seen, and posting them. There was talk on another forum about them being build numbers, but I do not believe that is the case. If any 86 2+2 members stumble on this post, I would appreciate a pic of the trunklid similar to the ones below.
Being the 4 examples I have are so close together, I am suspecting they are some sort of build date code. The more examples the better to figure out this mystery.
If any members cannot take a pic, then a verbal confirmation of the number would be appreciated. As you can see we have 107, 108, 111, and 116 off of 4 different cars.