Buffalo Bill question

[bear tooth billy]

I've done some living history at the Leclaire Iowa Buffalo Bill Museum (Cody's Birthplace). They have a few guns
but don't have a trapdoor Springfield. I've been looking for a reasonably priced one to donate. At a gunshow
today I found a 1870 trapdoor, that the guy gave me a very good price because where it's going. I know
Buffalo Bill shot most of his buffs with Lucrecia Borgia, a 1866  Allen conversion, but does anyone know
if he ever used a 1870. The museum doesn't care model 66 or 70, but my own curiosity has me wondering.
I know Cody used a lot of guns, so I hope he used a model 70 ?

                               BTB

[Coal Creek Griff]

If you don't get a definitive answer here, perhaps someone at the BBHC in Cody could provide it.  Just a thought.

CC Griff