[Phono-L] Columbia Grafonola Mignonette (later style)

[Antique Phonograph List]

I have an opportunity to pick one of these up; it's a nice-looking machine, and 
complete, though the spring(s) need to be replaced, and the mahogany finish is 
all alligatored.  Does anyone have any experience with these?  Particularly, 
I'd like to know a) how many springs the motor has; b) how they sound; and c) 
are there any other issues with the pre-WWI Grafonolas I should be aware of?  
I've never owned one before.  Thanks!