Actually another of my firearms, my 1870 or thereabouts, Rosier Martini-Henry .577/450.

Is it safe?

No idea. I believe so.

Would you shoot it?

I would. But I haven't so far.

Is it shootable or a wall hanger?

Could be either.

If people want definites, buy brand new firearms or very good condition used. Forget about anything old. Get it checked by someone competent.