Your search for "Upsetter" revealed the following:
MAX ROMEO [Public Enemy No1 / How Long Must We Wait]
SOLD OUTID No. 225807 Label CAMEL (UK) Production Genre / Condition VG+(SWD) Soundclip* Upsetter Big Shot / Funky Reggae ** レーベル少し染み。
THREE TOPS [Take Time Out / Just Like A Log]
SOLD OUTID No. 228831 Label BULLET (UK) Production Upsetter Early Genre Reggae70sEarly / Male Vocal Group Vocal Condition VG- Soundclip* Rare
TRUTH FACT AND CORRECT [Babylon Deh Pon Fire]
SOLD OUTID No. 226840 Label BLACK WAX (UK) Production Upsetter Late Genre Reggae70sMid / Male Vocal Condition EX(SOL) Soundclip* Reissue
U-ROY & THE CHILDREN [Yama-Khy]
SOLD OUTID No. 224830 Label PERRIES (JA) Production Upsetter Late Genre Reggae70sMid / Male DJ Condition VG(WOL) Soundclip* Very Rare
SUSAN CADGAN [Hurt So Good]
SOLD OUTID No. 223081 Label HOT SHOT (US) Production Upsetter Late Genre Reggae70sMid / Female Vocal Condition VG+ Soundclip* Lovers Classics.
THE MELODIANS [Round And Around]
SOLD OUTID No. 213537 Label WIZZDOM (JA) Production Upsetter Early Genre Reggae70sEarly / Male Vocal Group Vocal Condition VG Soundclip* Suffer
SUSAN CADGAN [Hurt So Good]
SOLD OUTID No. 193417 Label HOT SHOT (US) Production Upsetter Late Genre Reggae70sMid / Female Vocal Condition VG+ Soundclip* Lovers Classics
LEE' KING' PERRY [Trial & Crosses / John Tom]
SOLD OUTID No. 222676 Label SKA BEAT (UK) Production Upsetter Early Genre Ska / Male Vocal Condition VG+ Soundclip* Hot Ska ** Studio1
GEORGE FAITH [To Be A Lover / Diana]
SOLD OUTID No. 234621 Label ETHNIC FIGHT (UK) Production Upsetter Late Genre Lovers Rock / Male Vocal Condition EX Soundclip* Lee Perry Prod.
THE MEDITATIONS [Running From Jamaica]
SOLD OUTID No. 227077 Label WILD FLOWER (JA) Production Upsetter Late Genre Roots Rock / Group Vocal Condition VG+ Soundclip* Black Ark Rec