Hi Chris, You wrote:

> First, is there any way to acquire a cup for this model?

Yes, contact:

Gary Stevenson
Studio 801
801 Eichelberger Street
St. Louis, MO 63111-1648
Email: garyg@studio801.com.geentroep (delete .geentroep)
Cell phone: 1-314-753-8607
http://studio801.com/projects00.htm 

The web site link above is for his projects page. Scroll down until you
see "Cast Iron Christmas Tree Cup". There you will find information as
to what he will need to furnish a cup for you. He can also customize
the mounting hole to fit almost any maker's stem.

http://www.studio801.com/Cast%20cups00.htm 
http://www.studio801.com/Cast%20Cups14small.jpg 

> Second, since it works with the crank, musically and rotating, what
> is the power cord for? It has 2 spring-loaded nubs inside by the cup
> spindle that the cord attaches to. Does that negate the cranking?
> That would be nice!

The electric cord is to plug in Christmas lights. The "110" on the
label is to indicate 110 AC voltage power source for American use.
It probably has a 4-tune 50-note mechanical mechanism. I can't be 100%
sure without seeing the mechanics inside, but the hand crank probably
winds the spring that powers the musical mechanism and turns the cup
to make the tree turn.

> Any help would be appreciated.

Most sincerely,

Don Caine - Music Box Repair Center Unlimited
Lomita, California
https://musicboxrepaircenter.com/ 
mbrcu@aol.com.geentroep [delete ".geentroep" to reply]