Here's a picture of the part number off the XF SLA. This is molded onto the housing. Are you saying that it's the part number of the plastic housing and the assembly is something different?
The part number is the same as you describe except for the PP. Do you know what the PP (besides plastic part ) stands for? Not sure what you mean by white sticker with a 193 on it? I couldn't find any stickers on the housing, maybe it fell off.