CREATE TABLE table_31332 ("Manufacturer" TEXT, "Model" TEXT, "Intro Date" TEXT, "Interface" TEXT, "OS" TEXT, "Price  ( USD ) " FLOAT, "Price" TEXT, "Throughput" TEXT)

How many intro dates have the price of 686 ?
SELECT COUNT("Intro Date") FROM table_31332 WHERE "Price" = '686€'
SELECT COUNT("Intro Date") FROM "table_31332" WHERE "Price" = '686€'