Old clocks and watches & their makers : being an historical and descriptive account of the different styles of clocks and watches of the past, in England and abroad, to which is added a list of nearly twelve thousand makers (1922)
Britten, F. J. (Frederick James), 1843-1913, Britten, Annie · London : E. & F. N. Spon · leaf 620
as not generally viewed withfavour till the balance-spring was introduced in 1675; very soonafter that date it became universal, together with wheel-workarranged for a run of thirty hours. Among earlier and exceptional departures from the three-wheeltrain may be mentioned an unnamed watch in the…
Clocks and watches · Clock and watch makers
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