Regarding Regina serial numbers [140905 MMDigest].  Bowers'
"Encyclopedia of Automatic Musical Instruments", on page 177, has
a list of some of the serial numbers and their date of manufacture.

Also, the Musical Box Society, Int'l. provides the service of sending
you a 'birth certificate' for your Regina if you provide the serial
number and a small processing fee.  Contact Bob Yates for info on this:
rsublima@juno.com.geentroep [delete ".geentroep" to reply].

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