This choice Midland Railway tapper block bell has a very interesting history in so much as it started out life as an "indicator" bell, in the 1880s the M.Rly built a small number of special block bells for use in large busy signal boxes where there were lots of bells of similar tones. These bells were equipped with a metal red painted disc flag which "popped ou" when the bell was rung, this indicated to the signalman which bell had been rung so most likely this would have been a more important bell. The signalman would carefully push the flag back into the case resetting it for the next time and would have been done this when the he had finished using it. In practice these quickly became worn and damaged and they were all converted back to standard instruments and as far as all the experts know none have survived!. It will be noticed the vertical slot to the left hand side of the tapper has been filled. This instrument has its original plate " HALESOWEN JCT SLOW LINES" intact and the instrument is stamped M.R Co and LMS. THis instrument is in fantastic ex railway service condition.