Re: two tone Becker John, thanks for posting the additional photos. It looks to me the movement support pillars may have been colored at one time. The base outside the dome, however, just looks like normal tarnish on long exposure to the atmosphere. Your clock "is" a Becker, made right at mid-1912 based on the serial number. It is good to see the movement serial number scribed on the bottom of the pendulum, this shows the movement and pendulum started life together. It looks to me your clock is quite complete including the suspension guard.