Vintage Philips MC cartridges, but who built them?

@ All, thank you for your responses.

With respect to the Ortofon (T)MC200, I did once dismantle a broken one.
(one channel was dead) The generator inside looks very much like the generator
in the "Cantata" series, and the one in the A-90.

I still have another needle-less MC200 waiting for an occasional retip.

Best regards, L.

By the way, did anyone ever hear one of these?

Information on Yamaha MC-1S translated from Japanese
http://translate.google.com/translate?hl=en&sl=ja&u=http://audio-heritage.jp/YAMAHA/etc/mc-1x.html&ei=i3UwTofGL6jkiAKx6M2pBg&sa=X&oi=translate&ct=result&resnum=1&ved=0CCoQ7gEwAA&prev=/search%3Fq%3Dhttp://audio-heritage.jp/YAMAHA/etc/mc-1x.html%26hl%3Den%26client%3Dfirefox-a%26hs%3Di2q%26rls%3Dorg.mozilla:en-US:official%26prmd%3Divns

I own this cartridge and regard it very high.

Here is Phillips cartridge line in 1981.
http://philips.pytalhost.com/philips81/philips81-35.jpg

Check also the line of JVC (Victor) cartridges such as MC-L1000, MC-L10, MC-1, MC-2E. They are highly sought after.