Hello, Here are some photos of a Gustav Becker 400 day I have. No: 2160319 has also the same number on the bottom of the pendulum. All looks original with exception of the fork which looks from a much later clock, but am leaving it as it is because it keeps perfect time. Looking at the serial number and based on John's chart I estimate it was manufactured in 1911. Cheers Darius p.s., sorry don't know why this thread has shown up here tried to put it under the right title in GB section, please feel free to move.