Reflexe · Stationen Europäischer Musik, Vol. 1 - Studio der Frühen Musik, Thomas Binkley et al

The "Reflexe" series, released by EMI subsidiary EMI Electrola focused on early European music, mostly from the medieval and renaissance period.  It's well known not only for its incredible artwork 

by Roberto Patelli, but also the quality of these recordings, played on period instruments by the Studio der Frühen Musik, directed by Thomas Binkley, and a host of other performers.  These records have become collectors items, and are increasingly hard to find, even after being reissued on CD in Germany by EMI Classics.  John Zorn is reported to have purchased a complete set of the ten box sets (this being the first) on LP.  Fancy that.  The Machaut disc has been lauded by many, and I am currently obsessed with the French compositions on the Johannes Ciconia disc.

1 Studio der Frühen Musik - Oswald von Wolkenstein: Monophone & Polyphone Lieder
2 Studio der Frühen Musik - Johannes Ciconia
3 Studio der Frühen Musik - Roman de Fauvel
4 Ricercare-Ensemble für Alte Musik, Zürich - Ludwig Senfl: Deutsche Lieder
5 Linde Consort - Thomas Morley: Altenglische Consortmusik
6 Studio der Frühen Musik - Machaut: Chansons, Vol 1