Kaywoodie Thorn pipe find

[BryGuySC]

So my wife and I were perusing a local antique mall, and I happened upon a jar of pipes. Most were junk, but I noticed one with an interesting shape and saw that it was a Kaywoodie. So I stuck it in my shirt pocket and ended up paying a really good price for it.

Here is a quick pic, and then I have some of my findings so far.




It has a four digit shape number. I see online that typically puts it pre-1936, but I'll get to that in a minute.
74= Screw-in Drinkless Kaywoodie, Thorn finish, black vulcanite stem (1930's)
12= full bent Oom Paul (1932)

The Thorn line was from 1928 to the late 50s.

Although the 74 indicates screw-in drinkless, mine has no sign of ever have threads in the tenon, or a place for the drinkless stinger in the tenon. I read that could make it a WWII Era Kaywoodie. Kaywoodie discontinued the Stingers to save aluminum for the War effort.
Here is a pic showing paperwork from that era.
http://i.imgur.com/oJwIGda.jpg
http://i.imgur.com/wk5AuOt.jpg

I could also make out some some fainter stampings.
I see what looks like "MARYVILLE" or "MARYSVILLE" and "15-44" or "5-44."
Or maybe is is "MARY SAVILLE" and something else over the Kaywoodie name. I'll have to look at it with a magnifying glass, when I get home.
Edit: Went back and it definitely says , "MARYVILLE" but also says "CAL" "LAL" or "UAL" above the Kaywoodie stamp.
But the "44" would line up with the WWII timeframe.



And lastly, it looks like someone carved a tiny "JVT" on it. I assume those are just the initials of a previous owner.

So, whatcha think?
Anyone have any more info about these?