I bought a full case for my SM300 project. Case is 055ST1660324. Case comes with the 166.0324 marked caseback. Since I am going for no date version, I got another case back with 165.0024 that i will use. Due to this I have no use for the 166.0324 caseback. It is brand new, has protective sticker on it, only taken out of box to replace, and put back into the separate box. No issues of any sort. Looking for $250 net to me via PP. Shipping included. This is how much I paid for separate caseback, so just hoping to get money back. From what I saw they sell for more on eBay so there is that.