The story of Anton Harder, father of the 400-day clock /
Hubby, John,
The story of Anton Harder, father of the 400-day clock / by John Hubby. - 5 pages ; 28
Harder, Anton.
Torsion pendulum.
Clocks and watches--Design and construction--History.--Germany
Clock and watch makers--History.--Germany
Pendule de torsion.
Shelf clock Germany Anton Harder The author, York Pa biography oeuvre Hubby, John History
The story of Anton Harder, father of the 400-day clock / by John Hubby. - 5 pages ; 28
Harder, Anton.
Torsion pendulum.
Clocks and watches--Design and construction--History.--Germany
Clock and watch makers--History.--Germany
Pendule de torsion.
Shelf clock Germany Anton Harder The author, York Pa biography oeuvre Hubby, John History