This is a bit of a brute of a clock . It’s 40 inches high and weighs a ton . It has 40 markers so that’s some indication of how big the factory it came out of was . It works on a 30 second pause unlike some tell tail cocks that use a 1 minute pause.
Nothing seriously wrong with this clock . I have removed the lock so I could get a key to match the lock that I now have found. Just wants a polish and service. Andy 
Hello Gents
Hey Andy, is this a impulse driven slave? The majority of these that you see are wind up fusee movements.
Cheers Simon
Andy Sims
Simon . It has 2 , 30 seconds impulse units . One for the clock and one to drive the chart drum.
I have seen other Tell Tails but often they use a 60 second pulse. Andy