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 JAN (Joint Army Navy) 5AR4s which are mislabeled 5V4GA in original military boxes. Dr Z people, and others, love these!

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.

twww.kcanostubes.com/content/rectifier-comparison-and-interchangeability-chart

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).