Hello all,
Apologies if this is a nonsense post, but I'm hoping that somebody out there might be able to help.
I'm trying to write a referenced (!) article on this bit of it. This is the PCB from an 'Amstrad' 3" floppy drive circa 1985.
There's a Mitsubishi generic FFD controller QFP and a Hitachi motor driver, they're the only ICs.
Now, although lots of internet sources claim this is Hitachi (
Sugar basically kept a facility open for a decade blah blah blah) I as a
scientican can not find a reference for this beyond various old forums, BBs etc. I'm trying my best to tell the
right story. I imagine the symbol highlighted in red is a clue.

My suppositions:
- It's a registration mark for manufacture, MuMoTo is an idiot: ignore. I'm big enough, it's fine if I'm being an idiot say;
- This was made my Hitachi as per received wisdom;
- This is ORION (Japan) - this ties in with the literature I have found, but not the oft' told story;
- It's a common mark for some sort of compliance;
- Something else
I am trying to confirm the stories rather than just repeat stuff I've found online, if anybody can help please let me know!

It's from an Amstrad PCW8256.
Thanks for anybody who can help. Long time watcher of EEV but first post, hoping somebody might help me confirm or deny!
Ben