Not sure about Springys, but there is a Japanese article here that says Breezysound TE-80s had either bone or brass nuts (lower models were something else I can't read--pg22).
I'm not sure I'd consider nut material a reliable indicator of guitar model, as it's something that can easily be redone by a guitar tech.
________ Cancer - Cervical / Ovarian Advice
If one is seeking a quality, after market bone nut, one will be paying for it.
These guys charge basically $100 for a pro cut & dressed bone nut, and they do it right 8)
http://www.hoffmanguitars.com/guitar.htm
When you request real bone, they use real bone, not some Corian BS plastic.............
You get what you pay for; I should know, as they have done a few for me.
but then again, when it all comes down to it, it's all subjective, just like the poly vs. nitro issue, or the DRY Z vs. the whatever the flavor pickup of the day is, and balh blah blah & on & on & on ......................
http://www.google.com/search?hl=en&q=nut+material&start=0&sa=N
