Serviced, all steel, 36 mm In-house movement with famed proprietary‘double security’ movement which is why these pieces, known for their robustness & reliability, were in league with Rolex & Longines at the time. Very accurate & looks near-new. DS1 Date: https://albums.memento.com/pic74899 Album: https://albums.memento.com/top60184 $330 Net, ONO; includes shipping See other listings Thank you