Submitted as label variation, see history.
(p) Polydor International GmbH 1975 Disc 1
(p) Polydor International GmbH 1974 Disc 2
(p) Polydor International GmbH 1976 Disc 3
(p) Polydor International GmbH 1980 Disc 4
Box set includes paper four page information sheet with product and concerto titles in English  
As this was a US release, Deutsche Grammophon (Hamburg) did send the master tapes to Sterling for cutting the lacquers, and Sterling then send the lacquers to Presswell for plating and pressing.