Austrian label under AGS-Musikverlag and Belvedere Musik Edition International, presumably founded by Alfred G. Schittler.
The "Garden of Melodies" LP is not branded with "A.G.S." on the sleeve (labels unknown), but has a similar design and composer, and seems to belong here. I think it might be the AS 102 release.
LPs:
AS 101 - Sound Boutique - Erwin Halletz/Alfred Schittler
AS 102
AS 103 - Piano Lady - Renate Grell/RTV-Orchester Novisad
0120 187 - Garden of Melodies - Erwin Halletz
Composers:
AS 101 - Erwin Halletz/Alfred Schittler
AS 102
AS 103 - Gert Last (Gerhard Lasta)/Ken Roberts (Hans Czettel)/Erwin Halletz/Renate Grell/Alfred Schittler/Gert Hofbauer/Heinz Neubrand/Karl Grell/Joe Adam (Jovan Adamov)/Erich Benedini/Angelo Tondolo (Angelo Vlatković)
0120 187 - Erwin Halletz