Your search for "blank (test press)" revealed the following:

KEN BOOTHE [Without Love /Version]

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ID No. 238358 Label STUDIO1/BLANK (JA) Production Studio1-60 Genre Rock Steady / Male Vocal Condition EX- Soundclip* 70's Press / Dub

THE HEAVAN SINGERS [Rasta Dreadlocks]

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ID No. 226800 Label SUCCES (JA) Production Success Genre Reggae70sMid / Male Vocal Group Vocal Condition VG(LD) Track Irie Feelings Soundclip* Junior Delgado

RED DRAGON [Buss Blank]

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ID No. 245799 Label DRAGON (JA) Production JA Genre Reggae80sLate / Male DJ Condition VG+ Soundclip* Big Hit Dance Hall Tune!

JUST I [ False Brethren]

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ID No. 226268 Label BLANK( LUCKY) (UK) Production JA Genre Reggae70sMid / Male Vocal Condition VG Soundclip* Dem A Wolf Pioneers.

THEO BECKFORD [Bajan Girl / What A Whole]

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ID No. 239731 Label BLANK(KING PIONEER) (JA) Production JA Genre Ska / Male Vocal Condition VG ( Slight JS ) Soundclip* ロード・タナモの「dwon town gal」と同じメロディー。

TENOR SAW [Roll Is Called]

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ID No. 232579 Label POWER HOUSE (JA) Production Power House Genre Reggae80sEarly / Male Vocal Condition EX- Track Queen Majesty Soundclip*Tenor Saw出世作にしてSound Systemでは永遠にプレイされ続けられるであろうBig Foundation Classic**original pressgood condition両面versionラベルになっていますが、5/7/85と書かれたタイトルにダンスホールの歴史を感じる

PRINCE BUSTER [Burning Creation / Boop]

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ID No. 221571 Label BLANK( BLUE BEAT ) (UK) Production Prince Buster Genre Ska / [A] Male Vocal [B] Inst Condition VG Soundclip* Bad Tune! / Raymond Harper