BASF
various type I models including budget series Sound
LH-EI 90 (LH extra I)
mid-late 80s model
big window, single/joint sticker on each side
LH-EI 90 (LH extra I)
mid-late 80s model
big window, separate bottom and top sticker on each side
LH-EI 90 (LH extra I)
mid-late 80s model
small window, separate bottom and top sticker on each side
The Colors Of Sound 90
early 90s model
Soundtrack 90
early 90s model
Sound Level I 90
early-mid 90s model
Sound I 90
mid-90s model

Sound I 90
late 90s-early 00s model
EMTEC mention on back side only

Sound I 90
early 00s model
EMTEC mention on back side remains, on spine transitional logo is added
Sound I 90
mid 2000s model
fully EMTEC branded
OEM
Hema SF 90
early 00s model
Inside there is likely Sound I or Ferro Extra I.
Considering price sticker, likely was sold in Netherlands and Belgium before Euro currency.
Possibly a chain stores' brand
(c) & (p) 2023 ゆう