Something looks very familiar with that photo
Yes, it is a take down spring. Unused and original.
I guess you would need a bucket full of them?
You can send me a msg, and I will find a price for you.
Best regards Steinar
(Steinar*** on Ebay ..btw...the reason for my alias Morgan Kane here, has to do with the books about the character Morgan Kane, the books where my favourite when I was a little cowboy myself