Not quite up to Huvius' standard but for your interest

Alexander Henry Best rifle in .450 No. 2 Musket for the Duke of Marlborough (Winston Churchill's grandfather) 7 January 1877

Alexander Henry plain grade rifle in .450 Express, one of 3 ordered together by the Duke of Westminster for his stalkers??
2 October 1894

Early George Gibbs Match rifle, 1870s? rebarrelled to .500 3" by Jeffrey, probably early 1900s

Farquharson in 450/400 3/14" Nitro by Thomas Turner (who made many rifles for WJ Jeffery)
Dates 1903-1910, debatable after discussion with Jonathan Kirton

Maybe a few more to follow

TH44