Q, probably not the best description on my part. Should have said Rare perhaps. This slide is the only other that I have seen with a similar serial number to my P229. Was hoping someone might have some meaningful insight into this serial. Maybe some sort of limited run or the like.Since you have a P229 with the same style serial number, then clearly, the slide's serial style in the OP is not unique. So, not sure why you said it was. Might not be common style, but not unique.