Mickey,

It's a Jeffrey Underlever (Jones I believe) Hammer Double Rifle.
The gun belongs to a friend of mine and still gets used occasionally
when we want to break a shoulder or two !!!

I THINK from memory that the Serial No is eleven (11) before what was
previously thought of to be the first 600. I have the records somewhere
from some research I did on the gun when I had it for 3 - 4 months on loan.

It's great to shoot and it's what got me interested in 500 Nitro's.

Email me if needed.

500 Nitro