Age of shooter: Born 1954 - 50 years.

Purdey .500 BPE made in 1894 - age of rifle: 110 years.
Age difference: 60 years.

J. Woodward & Sons .450/.400 3.25" Nitro Express made in 1891 - age of rifle: 113 years.
Age difference 63 years.

Thomas Horsley & Sons 12 bore double rifle circa 1875 - age of rifle 129 years.
Age difference 79 years.

Some things improve with age (maybe not men, though)!

Cheers,
CptCurl