One Vintage British made Mullard wide base f31 5AR4 / GZ34 rectifier (branded Eico by Mullard). Purchased as used, tested good and stored as backup since. Stenciling and flashing are both good. Please see photos. This is the coveted wide base f31 type! Code is f31 B9H (Blackburn factory). There is also 111 with 1022 just below that sideways on the glass. You can see the codes in the photos. Double halo OO top getters. Photo of this tube in preamp to verify operation. A second tube is also available.
If you are looking, you likely know what's what. Just in case, please be aware that most of the Mullard 5AR4 tubes here and on ebay are not wide base and not f31, hence lower prices.
Will ship in white tube box and will be very well packed.
Lightening up from my obsessive tube collecting and funding more audio!
I will eat the Paypal fee if Paypal is used. First Class USPS insured shipping anywhere in US will be $7.00. Other shipping methods or Canada will be actual cost. As is without returns - please examine photos. Long-time ebayer/Audiogoner with good feedback.
Other power tubes (KT-xx, 6550, EL-34, 6V6, etc families), signal tubes (mostly in 6922/6DJ8 family), 5 volt rectifiers available. Please ask for what you are looking for.