Can you detach the head of the hollow Tech? If not it’s a Psycho Tech missing it’s key.
no, the head can be detach. I think it's the know made in england tech for the french market. I've seen a few of these set lately both with hollow and standard handle. as they seems to belong more or less to the same period (late '40 i think) and I still don't understand why these set came with both handle styles. IMHO I don't belive that you can always explain situations like this with "mismatched set"