I have the opportunity to purchase this early Zephyr tenor. Serial number 188xxx dates it to 1936. It has the rectangular low Eb and C touches typical of the first run Zephyrs. What's confusing is it also appears to have a double-socket neck, which I thought came around much later. Of course I'm going to try and get more pictures before I make the drive (about 100 mi) and play test it. Also comes with a vintage Dukoff D6. Seems like a good deal at $1200. What do you think?