American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 208
50. It is not easy to pronounce briefly anopinion for or against the free spring ; for,judging equitably its merits, we have to con-sider its drawbacks and the objections raisedagainst it by watchmakers and repairers, andbalance them against the advantages it pro-mises. These hitter are : 1.…
Clocks and watches
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