cal. GUB 39 nickel lever automatic winding movement 51 jewels • bi-colour dial black and silver with applied steel baton indexes subsidiary dials for the second 30 minute and 6 hour registers outer 1/5 second/minute divisions luminous steel baton hands • polished and brushed case bezel graduated to 300 units screwed down crown transparent case back secured with 5 screws sapphire glass • case dial and movement signed • with a stainless steel Glashütte Original double deployant clasp