Horolovar guide and how to determine the correct suspension spring for a 400 day clock

A couple of years ago my daughter gave me a Horolovar guide as a Christmas gift. Any horologist will agree that the Horolovar guide is indispensable when working with 400-day clocks. It is not a manual one opens up regularly but when working on 400-day or anniversary clocks, as they are often called, it is … More Horolovar guide and how to determine the correct suspension spring for a 400 day clock

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