Does anyone have a 9" Britannia disc they would sell or loan me, so
I could take measurements for production of new discs?  (It could be
unplayable.)  Also, does anyone have the tuning scale for this box
[Britannia, manufactured by B. H. Abrahams of St. Croix, Switzerland]
or know where it's published?

Thanks,
Jack Perron - HensTooth Discs
http://www.henstoothdiscs.com/