Great photo!......but Arisakas for sure. The Vetterli bayonet mount is on the right side of the rifle barrel, not underneath and seen in this photo. The bayonet quillion and tip shapes are alsp markedly different on the two different bayonets and the blabe of the M1870 Vetterli bayonet is much longer. I'll add a couple of photos later. I have a business meeting in a short while.
Good eyes John!
PS - It's sooooooo nice to be home!