It is one of the Zella-Mehlis Roux action variants:
http://www.doublegunshop.com/forums/ubbt...true#Post274691

I've seen the star on the lower tube just forward of the flats but usually it is paired with a H. Any initials in the dolls-head well of the frame or near the forend hanger, besides the LK - Louis Kelber?

Kind Regards,

Raimey
rse