Mainsprings for 400 day clocks

HOLE END CLOCK MAINSPRING 12mm x 0.30mm x 32mm Clock-grade steel. Many of M&P's mainsprings were p…

HOLE END CLOCK MAINSPRING 13mm x 0.36mm x 30mm Clock-grade steel. Many of M&P's mainsprings were p…

HOLE END CLOCK MAINSPRING 13mm x 0.55mm x 32mm Clock-grade steel. Many of M&P's mainsprings were p…

HOLE END CLOCK MAINSPRING 14mm x 0.41mm x 28mm Clock-grade steel. Many of M&P's mainsprings were p…

HOLE END CLOCK MAINSPRING 16mm x 0.46mm x 36mm Clock-grade steel. Many of M&P's mainsprings were p…

HOLE END CLOCK MAINSPRING 21mm x 0.38mm x 50mm Clock-grade steel. Many of M&P's mainsprings were p…