Thread bobbin - old sewing machine (SG17 (Shefford))

Looking for someone with an old sewing machine (e.g. Singer).

Clearing out my Mum's old sewing box, I found one long thread bobbin for her old (long gone) Singer sewing machine - so I am looking for someone in the Shefford / Hitchin area with compatible machine and who'd like an extra bobbin (you can't have too many).
It's a little thing, not worth travelling far, but if you could use it and are anywhere near my usual paths, I'll happily drop it (in an envelope) through a letter box.

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