Peter C. emailed photos of his Holland and Holland Royal in caliber .375 x 2 1.2 inch. Peter writes: Built for Lord Durham in 1906 it was resold to Wing Commander Woicjiech Kolaczkowski in 1947 at which time the 2.5 x Zeiss 'Scope was fitted. It's one of my treasures. Kolaczkowski was in the Polish 303 Squadron in the battle of Britain and emigrated to the States in 1948 apparently. In the mid 90's he married his cousin Martha and moved to Sarasota, FLA. He died there 19 July 2001 aged 93.