4  NOS Western Electric 427A/6141 tubes. Some of these are just marked 427A, some just 6141, and some are marked 427A/6141. Almost all of these are dated from 1957 to 1960, although there are a couple from 1955, and I think a few from later in the 1960's (I haven't looked at every tube, and some of the boxes are sealed shut with tape). I have over 100 of these, so 25 sets are available. For each set, I'll pick 4 tubes from the same year, unless you want a variety. Feel free to ask for more photos or information! I do combine shipping.