Hello, I am trying to give some place and time to this family heirloom (silver watch) https://www.dropbox.com/s/j7m3cr0bieyeu1u/IMG_20190721_140457_1500x1500.jpg?dl=1 I know it is German and post 18888 (and the crown, crescent and the "0.800" seem to confirm that) ... but is that, unfortun...