Lightly used, test as new. Various labels including Sylvania, RCA, etc.
NOS in original IEC Mullard blue box. 7 "ridges" in the plates.
High quality German GZ34. Sold in white boxes with original corrugated cardboard wrappers.
NOS in original boxes. Very rare especially in matched pairs.
NOS in original boxes.
Octal (8 pin) solid state rectifier fits standard 5AR4, 5U4, etc sockets.
Be sure to read this article before using this item as a substitute for a tube rectifier.
The following are all manufactured by the Mullard tube company in England. All (except for the earlier production Large Base version) are IDENTICAL. All bear the famous "center hole in the guidepin", same production codes, and exceptional Mullard quality which is second to none. These typically last decades as compared with modern production GZ34/5AR4s which last hours to a couple of years (if you're lucky).
Excellent quality, cost effective tubes. MUCH higher quality and longevity than any of the modern production GZ34/5AR4s. Highly recommended.