NOS Sylvania 6AU6A Matched Trio 1955 Gray Plate Code Matched Tubes Original Boxes

Matched trio of new old stock Sylvania 6AU6A vacuum tubes, new in their original boxes. Made in USA, featuring gray plates and matching 5-3-1 production codes, identified as 1955.

Tested on a Hickok 800A: • Tube 1: 2400 GM • Tube 2: 2500 GM • Tube 3: 2475 GM • New stock reference: 2300 GM

All three test above the new stock reference and are closely matched.

Includes the three tubes and original boxes pictured. Boxes show shelf and storage wear.