What is the oldest (apart from yourself) bit of kit or tools you still keep on the boat? I was just thinking we still have tools made by my Dad as part of his Shipyard Apprenticeship in the 1930's. I still use some wrenches my Grandfather used during the 1940's. We even have an old Decca radio direction finder, although it's at home not on a boat these days. And not forgetting the most important one (below). Do you have anything older?
I haven't worked on a boat in a few years now, but I used to use an old egg beater hand drill I found in a second hand shop. Talking with woodworkers who were more into tools than I I got estimates from the 1930's and 1940's.