> Seeking date of manufacture for my Reginaphone serial no. 600102

According to the book, "Encyclopedia of Automatic Musical Instruments"
by Q. David Bowers, serial number 600102 dates the machine to 1902.

Enjoy!
Nancy Fratti - Nancy Fratti Music Boxes
Canastota, New York, USA
http://www.nancyfrattimusicboxes.com/