Need help identifying a mast

So a friend inherited a mast the other day and I'm stumped. Can't figure out what it is. It looks a lot like a Prindle mast because of the head and base, but it is too small to be a prindle 16. It is about the same size as a Hobie 14 mast. The mast tang seems a little high to me, too.

I want to say it is a Prindle 15 mast, but...

http://www.thebeachcats.com/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=124583&g2_serialNumber=3
The shape of the extrusion is a little odd to me, too. It is a tear drop shape, but kind of a fat tear drop.

http://www.thebeachcats.com/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=124584&g2_serialNumber=3

http://www.thebeachcats.com/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=124587&g2_serialNumber=3
Prindle masts all have a hinge on them, and the top sheaves are the same size.
The P 15 used the same extrusion as the 16 and 18, just shorter.
That isn't a P 15 mast.
We should be able to match the top casting to something.

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Sheet In!
Bob
_/)_____/)_/)____/)____/)_____/)/)__________/)__
Prindle 18-2 #244 "Wakizashi"
Prindle 16 #3690 "Pegasus" Sold (sigh)
AZ Multihull Fleet 42 member
(Way) Past Commodore of Prindle Fleet 14
Arizona, USA
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How about a Venture 15? There is one for sale on craigs and the extrusion looks a lot like it, but I can't tell from the pictures.