For sale is a beautiful high end in the 198x's headunit with amplifier, which you would have found fitted in 

Porsche 911 G, 924, 944, 928, Carrera/Turbo, Mercedes, Rolls Royce, BMW e28 M5, 635Csi, M3, 325i, 323i

Unit was made in Germany in ~1981-1983 and was at TOP!

BLAUPUNKT NEW YORK SQR83 Stereo with Blaupunkt BQB 80 Amplifier

And this head unit is in great condition for his age!! Look pictures (it is 34 year old)!

Serviced, refurbished, then tested for all functions and is fully working! 

AM/FM/LW/Cassette player with Dolby, CPS, Autoreverse, ARI, Stereo and other great features (yes, in 1981)

That is why it was used in most expensive high class cars.

Head unit size in normal Single DIN.

Check all pictures.

Fully original.