I have posted two pictures of the same boxes below so you can read each box right-side-up. As you can see, both boxes list the Manufacturer as Mullard and the Tube Type as 12au7. But one lists the Brand as Bugle Boy (which I thought was an Amprex tube?) and the other as something I cannot read but looks like Welscon (?). Also, one box says 1958 LP for Production Type and the other something I also can't read, but looks like Halo G--- 1958 LP. Unlike the other matched pair, they also have different inspections dates.
The boxes for the other matched pair, which are not pictured, just say Mullard for both Manufacturer and Brand and 1958 LP for both Production types and have the same inspection date. Because he pre-installed them for me, and the preamp is now in a shelf, I've not opened the case to inspect the actual tubes yet.
It seemed to me that maybe there was a mistake in putting these two together before shipping, but my dealer doesn't think so. Could anyone help explain this for me? Thanks in advance!
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