(3) Vintage Matched Siemens 5814A (ECC82 12AU7) Long Plate 3 Mica Rare NOS Made In Germany.  This is a really nice set.  All have bottle codes of "D73" (which from my research would be April 1973) and matching graphics. I tried to get a pic of the etched code but was difficult so I just wrote them down - see pics. Etched codes indicate Siemens Halske plant in Munich. Gm test results = 72/73, 77/77, 74/77 on Hickok/Western Electric Cardmatic KS-15874-L2.  These are strong and well balanced.  I realize I only have white boxes but selling as NOS given cosmetic condition and extremely strong test results.  No disappointments with this rare group. Guaranteed as described and to your satisfaction. Shipping in continental USA is $5. I will ship internationally for $23.