I have 5. Only the 3 mentioned in my first posting are confirmed to be genuine in terms of production date, i.e. not composed from different case parts, mainboards, PSUs etc.
XM1148280, NTSC, PSU from Oct 1985. Mainboard revision not confirmed, most likely a rev. 6
I just spotted this one which also appears to be period correct: XM1146441, NTSC, PSU from Oct 1985. Mainboard revision not confirmed, most likely a rev. 6
XM4104936 PAL machine
Late 1986/early 1987 purchase and in my possession since.
PSU from Jun 1986 (Shindengen CA1000PS/EC Serial 035105)
No record of original motherboard revision: now a Phoenix board