Distinguished SOTW Member and Champion of the Holt
It's close, but not quite the same. I compared with some pics of a Martin Handcraft tenor on ebay, as well as info from Cybersax website.Looks like a Martin. All the details fit.
My Holton's soldered tone holes are not beveled. Neck tenon on my Holton tightens from left hand, vice from the right as Martins are said to do. F-F# trill keys are different (Martin is teeter-totter, Holton has lever rotating on perpindicular plane to length of sax.) LH palm keys are different (Martin F3 key curves around E flat tone hole, mine doesn't). RH pinky key spatulas are shaped differently. Bell braces are different too. Mine "Y's" out along width of bell, Martin looks in pictures like it goes up bell.
update: Found a pic of a Handcraft with the non teeter totter trill key (the Brass HC tenor on Saxpics). I couldn't see serial numbers, but the brass tenor looked older than the other (silver) examples. Also with the HCs--some have protruding supports on the bow, some don't. My Holton does not (it is "Conn-like"). Still lots of differences.