more discussion
But
Sonny's MCS shrine page seems defunct...maybe the Wayback Machine still has it.
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See post #22 for the link to the wayback machine.
Between Sonny's page, the Vintage Knob, and numerous threads here on AK, there is a lot of guessing and misinformation floating around on who made certain MCS pieces.
I hear mention of Itoh Japan many times, but no amount of googling has confirmed (to me) that they ever manufactured stereo gear. I do love a good mystery, though, so I'd love to find out more...:yes:
NEC did manufacture all it's own stereo components (not including turntables and speakers). They got into home hifi in the late 70s, and got out of it in the early 90s. More than a handful of the MCS pieces were simply NEC rebadges, while some were made by NEC built specific to MCS specs. NEC provided many pieces for Curtis Mathes, also - I have a handful of those, too.
Of the MCS pieces I own now, or have owned in the past, here are the ones built by NEC - as confirmed by the manufacture's codes on the circuit boards:
3253, 3275, 3125, 3246, 3260, 3265, 3285, 3035, 3822, 3830, 3835, 3847, 3865, 3872, 3530, 3556, 3562, 3563, 3564, 3595, 3700, 3701, 3710, 3730, 3050, 6805, 6806, 6807.
From doing research online, I will also add these: 3248, 3249, 3226, 3236, 3224, 3237, 3820, 3823, 3845, 3837, 3850, 3870, 3871, 3873, 3874, 3520, 3565, 3596, 3522, 3523, 3575, 3705, 3722, 3723, 3720, 3051, 6803
I do own one piece that is a complete unknown to me, so maybe Itoh Japan made it - the 3561 cassette deck. It was made in Japan (not Taiwan), and the insides give up zero clues as to who made it. That one really stumps me.

(Update: the 3561 is a twin to a Project/one deck that was made by Pioneer)
The lower power receivers like the 3212, 3223, 3233, 3235, and 3245 were all from Taiwan. Maybe Itoh designed them, supplied the parts, and had them assembled in Taiwan? I'd sure like to know for sure.(Update: Itoh did NOT make these units. They were designed in the USA by Arvin Electronics, and manufactured in Taiwan)
Maybe someone can add to this and help fill in some knowledge...