Loop end mainspring for 30 Hour clocks. Size: 5/16″ (7.94mm) Width x .015″ (.381mm) Strength x 42″ (1066mm) Length.
30-Hour Loop End Mainspring – 5/16″ x .015 x 42″
Loop end mainspring for 30 Hour clocks. Size: 5/16″ (7.94mm) Width x .015″ (.381mm) Strength x 42″ (1066mm) Length.
$3.50