Labels A-Zletter 'O'

OE

Oehms Classics (30)
  OI

Oiseau Lyre London/Decca (42)
Oiseau Lyre London Double Decker (8)
  OL

Olympia (Classical/Jazz) (4)
OM

Omega (3)
  ON

Ondine (160)
Onyx Classics (22)
Ongaku (3)
  OP

Opera D'Oro (328)
Opus 111 (76)
Opera Rara (64)
Opening Day Recordings (5)
Opus 3 (Sweden) (4)
OR

Orange Mountain Music (USA) (30)
Orfeo D'Or (19)
Orfeo (8)
Orange Mountain Music (UK) (1)
Orf (1)
  OT

Other Minds Records (2)
  OU

OUR Recordings (2)
OX

Oxingale Records (15)