I recently acquired this interesting, and mostly original, Seth Thomas #4 tower clock movement. It's a secondary, or "slave" clock (master/slave clock was voted the year's most politically incorrect phrase in 2004 by Global Language Monitor, and I agree that it's time for that terminology to go,, for reasons that should be obvious.) The movement is made to receive an impulse every thirty seconds from the primary clock, at which time the double solenoid seen on the clock frame pulls off an arm for a second, and then releases it. In that time, a fan on what would be the escape wheel arbor slows the turning of that arbor and an arm extending from it, which then is stopped by the pull-off arm mentioned above. This same movement, with electric winding, is shown on page 16 of the Seth Thomas tower clock catalogue (number 8), republished in 2000 by Robert J. Kolyer, of which I have a copy. The movement at hand is manual wind, and always has been. The sprockets are present, as is the chain, but the weigh and bottom pulleys, if it was so equipped originally, are missing. If anyone here has seen one of these, or has photos of an original example, or, better yet, owns one, I would love to hear from you. I would like to find an original weight/pulley assembly if possible. Failing that, I will have to have something made, so it will be helpful to see what it is supposed to look like, what it weighs, etc.