Mullard 12AX7 Matched pair, 1960's ribbed plate

One is labeled Mullard and the other is labeled Webcore. These are 1960's ribbed plates. They are well matched and test very strong at 1600/1600 and 1600/1575. It's hard to get a better electrical match than these and of course they're matched structurally. The Mullard-labeled tube has the original box as well. I can supply date code information and additional pictures if necessary. These were purchased only a month or two ago from a very respected tube dealer that I've bought many tubes from over the years. I went through a lot of tube rolling for a new amplifier recently and now I need to sell some off to finance the next purchase. I'm asking a very fair price. Well matched strong-testing pairs are going for $200 minimum.