CREATE TABLE table_63601 ("Date" FLOAT, "Single" TEXT, "Backed with" TEXT, "Record label" TEXT, "Format" TEXT, "Other details" TEXT)

What's the date for Details of 1000 copies?
SELECT MIN("Date") FROM table_63601 WHERE "Other details" = '1000 copies'
SELECT MIN("Date") FROM "table_63601" WHERE "Other details" = '1000 copies'