this one advertises as a 12/70. is that just a fancier grade? or just quite overpriced?
12/70 stamped on the shotgun barrel for 12 gauge, 70mm (2 3/4") cartridge. Tikka called this the Model 07. There was a discussion of these here just recently:
https://www.24hourcampfire.com/ubbthreads/ubbthreads.php/topics/13566967/tikka#Post13566967They are nicely made, but there are plenty of better designs for use as a combination, and that price is very ambitious.