I just bought a 1973 daysailer II hull #XDYD67620673. The mast is not original. The seller said it was from a Mercury but after talking to the folks at Cape Cod Shipbuilding, I think it's something different.
It is a tapered, black annodized mast. Here's the mast section:

And here's the boom section:

The spreaders are swept aft:



One distinct feature is the triangular barb that is welded to the masthead. I guess this for a backstay, but maybe it's a custom job:

The shrounds attach between the spreaders and the masthead:

And finally the gooseneck:

If these look familiar to anyone, please help. I would like to find out where I can get replacement parts, etc. Otherwise, the mast works great.
Gabe
Reno