Hi Group,  This does not apply directly to mechanical music but the NBC
[National Broadcasting Co.] chimes were made by J. C. Deagan, a name
familiar to MMDers.

Read about and hear the fourth chime!  Learn about the conversion
from Deagan to Rangertone electronic chimes.  See the story of the NBC
chimes at  http://home.flash.net/~billhar/chimes.htm

Enjoy!

Jack M. Conway, Los Angeles, California, USA