I change a new mainspring and regain the lost tension.
This is a list of Replacement Part.
This is a mainspring attached for the machine of 1930-1950's.
This is a broken mainspring and new mainspring.
These old machines are made in cast iron.
The throat holder is made by cast iron, too.
This is a top lever adjustable screw of the 1930s.
This is a top lever adjustable screw of the 1950s. The part of the details varies according to the generation.
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