Interesting piece of horn, there Jim. Any idea of its function? I was hoping M-4 would chime in with his thoughts.

Mike Ford chimes in via email to note that the maker of additional tubesets would serialize the new set to the sporting weapon and many times stamp the number of sets on the action flats. I have seen the same but on the barrel flats. He also notes that the 1927 set has 16 bore 65mm chambers while the 1936 set has 16 bore 70mm chambers.

Kind Regards,

Raimey
rse