That is gorgeous!

@nik-kostel It’s a 650 Supreme. I believe it was designed by Accuphase for Kenwood, after Accuphase had spun off. There’s some good info in this video:
http://www.youtube.com/watch?v=_slMA2pOSfw&t=294s (the rest of this channel has a lot of excellent info and Ben is a great guy).

Also some info here: http://www.thevintageknob.org/kenwood-Model_600.html

Some of the information on the web says the 600 and 650 are the same but the 650 has a dark faceplate. However, there’s a Kenwood Supreme facebook group and someone there posted a brochure for the 650. That one said the 650 has 145W/channel where the 600 is 130W.

@nik-kostel I agree. I was never a big fan of their receivers, but their integrateds are great.