Vintage IEC Mullard 12BE6 vacuum tube in its original blue IEC Servicemaster "International Electron Tube" box. The 12BE6 is the 7-pin miniature pentagrid converter used in All American Five (AA5) table radios. The glass is printed 12BE6 and Mullard. Untested; sold as found. The box shows edge and corner wear and scuffing; the glass print is partly worn.

Mullard glass is sought by radio restorers and tube collectors. A good single for completing or servicing an AA5 set.

Please see all photos for the box and the tube itself.