1/ GE 石墨 6DJ8 ,Made in USA,白粉字 $400 / pair
2/ Amperex ECC88 ,Made in Holland,橙字,雙撐骨,花洒碟,有暗碼 $500 / pair
3/ Philips ECC88 ,Made in Holland,白字,花洒碟,有暗碼 $500 / pair
1/ Brimar ECC88,白粉字,有暗碼 ,$500/pair
2/ Amperex ECC88,Made in Holland ,無字,細圈,$400/pair
3/ Telefunken ECC88,德國制,肥圈,菱底,無字,$700/pair