Nobody has asked me either Peter, And yes that is the original pin vice as used by watchmakers for nearly as long as Woody has been in long trousers init?
The link type called such because of the use in holding pins. These because they have a pin in the construction.
Whatever you wish to call it it is your work and a fine tut mate.
Looking forward to seeing this compo and dissecting the rules as to whether it has to be a pin chuck or the closed end pen that will be judged, maybe both so I spose I had better make one.
There are many ways of making closed ends and a chuck is not required at all for some methods init?
