Just put a toe through mine and inclined to bin it rather than darn it. I've got loads more (mostly odd ones LOL). Would you bother darning it if you were me?
Last time I darned socks was for my dad. He would only wear pure wool socks and a lady who lived nearby knitted them for him. She always gave him some spare wool which I used to darn them if required.
There were eggs and mushrooms, ladybirder, of different sizes that were used to darn socks. Usually wooden but also made of bakelite. You can still buy them :)
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