Calin, I have seen very similar actions in 1860-ish Chickerings. The action is a Single Escapement Type and is a bear to regulate for consistancy, (much like that of the Square Grand type single escapement actions!) That's about all I can tell you about it. Since it is German, possibly ask a German Tech.?? Regards, Joe Garrett, RPT, (Oregon) Squares Need Love Too!<G>
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