My Macintosh External Disk Drive M0130 has a Sony single-sided drive revision I've never seen: OA-D34V-01. I recently received it and opened it up to check the manufacture date (April of 1984), and when I looked at the model number, it didn't match any I've seen or heard of before. I was under the impression that only the Sony OA-D34V and its revisions OA-D34V-02 and OA-D34V-22 existed.
My only theories are that it's a revision rejected by Apple, or some sort of pre-release revision prototype. However, that doesn't explain how it ended up in an M0130 and sold by Apple. Aside from speculation, I can't find any data whatsoever regarding my drive's revision, and was wondering if anyone else here has. If so, how did it come to exist?
Thanks in advance.
Picture below displaying the model number and its strange -01 revision.