The 470 Rigby I owned was built in 1911. It had a lever release forend which would indicate an early gun. Paul Roberts, the previous owner of Rigby is an old friend and looked up the information on the gun for me. I will admit that the Rigby was the most accurate double I have ever owned and would place a bullet from right and left barrels touching at 60 yards. I used the rifle in Africa and took a great Cape buffalo and a Zebra with it. I really miss that rifle and wished that I still had it!