Farmhouse handle springs

A handy person from Saint Cloud, FL says:
Only mark I see is the number 031 stamped on the inside of the metal.
All the springs are broken inside due to age. There are a total of 10 doors in this old farmhouse.
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Emily from SWISCO responded:

Hello there!

Start by comparing your dimensions to our 42-009 interior mortise lockset and see if this matches up to your original hardware. 

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