Mullard E180F tubes (same as US number 6688 ) British and Dutch made. The tubes are new old stock (date codes are from the 60's and 70's) and from factory OEM crates. Price is per tube. Offers on this item considered for quantity purchases. This item is shipped from Britain, in North America or Asia please allow 2 to 3 weeks for delivery.
Data on this item: http://www.mif.pg.gda.pl/homepages/frank/sheets/030/e/E180F.pdf