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<p>[QUOTE=&quot;afantiques, post: 441802, member: 25&quot;]It <i>seems that you don&#039;t well understand my bad english, what I say is if you can find anything made with metal which has the characteristics of an industrial product, it cannot be made before certain dates which are known for each type of profile, if you find on a clock big dimensions perfectly laminated plates they cannot be made before 1770 for example, if you find something of iron/steel without a refinished surface which has metric or english exact dimensions, it cannot be made before 1860-70 too(technology simply doen&#039;t exist before), but as I have not this movement in hand I give no information about it but the manner to analyze metal to detect period, false or repaired parts.</i></p><p><br /></p><p>This is true but I see nothing unusual in this movement to suggest a later date, examination of the top and bottom plates would probably show typical brass flaws from the rolling process.</p><p><br /></p><p><br /></p><p><i>A contrario makers of anything living in isolated parts of countries can use techniques a century later than they are produced in big centers and it&#039;s always something to consider if you have a doubt, as the use of old measures used later than official are normalized by governments.</i></p><p><br /></p><p>This is true, you can find Scottish verge escapement pocket watches long after the lever escapement was universal further south, and conversely makers in Kent and Sussex tended to use the birdcage movement later than others but cumulatively this clock uses mid 18th C. styles sufficient to date it. I have never seen any gross regional exceptions to this.</p><p><br /></p><p><i>For the weight I try to explain exactly the reverse you understood, the best way to preserve your mechanism is not to begin with heavy but with lightest as possible to make function.</i></p><p><i>More your mechanism was bad maintained heaviest are the weights needed too.</i></p><p><br /></p><p>I entirely agree with you that the weight should be as small as will drive the clock reliably, but here we are talking normal practice, not best practice,and the 7 pound weight is standard for 30 hour clocks.[/QUOTE]</p><p><br /></p>

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