Sam Holmes, manager of the Penknife Department at Joseph Rodgers & Sons, giving the Norfolk Knife it's annual service.
This Saturday the Cutlers Hall in Sheffield is open to the public where you can see the Norfolk Knife on display as well as many more fantastic items.
Sheffield from the air in 1933.
It takes a bit of effort to work it out, best start with the River Don at the bottom with Blonk Street bridge and Lady's Bridge.