Parabola, it is indeed a 10 bore. My memory was faulty when I was posting. The Parker brass 10 bore case [was it from Track of the Wolf??] fits perfectly. I'll attach a couple of pics to look at the lump style. Thanks for identifying the Bonehill patent.

[Linked Image from i.imgur.com]

[Linked Image from i.imgur.com]

Last edited by Daryl Hallquist; 11/14/21 10:45 AM.