128k to 512k upgrades that replaced the case
Not likely unless you know that for sure. When you took your 128K into an authorized Apple service center, they swapped out the 128K board, kept your original ROMs (pre-1986), and replaced the rear bucket label with the 512K logo. The case remained the same one you originally purchased. The upgrade kit merely came with a ROM-less 512K digital board and new label.
The only way I can imagine they replaced the rear case, is if it was upgraded to a 512K after 1986. In which case, they may have upgraded some 512Ks to a Plus and had a stack of 512K buckets and 512K boards in the back room and they just swapped out your with one of those.
Also, if it has SCSI, then the it was updated to a 512Ke with the 800K drive kit, which included the 128K ROMs. So what you have there is the original 128K case with a 512K upgrade kit & 800K drive kit and most likely a Dove MacSnap SCSI ROM board. It could also be any number of other accelerators with the SCSI board expansion, but the MacSnap was the most common I have seen.