Aluminium sonic screwdriver (Tom Baker version). Spring loaded action. I had the parts milled for me and I put them all together myself. Whole thing cost me about £150 to make... ouch! Worth it though.
I bought a lathed aluminum sonic screwdriver in probably late 80s or early 90s, and it looked very much like that.... except mine was literally all one piece of aluminum and NO part of it was movable. COMPLETELY static prop.
Hi, The metal pieces were milled on a lathe from aircraft grade aluminium. A few are resin cast. The interior contains a spring to allow 'activation' motion to take place (watch 'Ark in Space' or 'The Sea Devils'.