Have an old sewing machine, looking for exact date and maybe value

My antique Singer 15 sewing machine < with my hands - Dream

SINGER 9960 Sewing & Quilting Machine With Accessory Kit, Extension Table - 1,172 Stitch Applications & Electronic Auto Pilot Mode

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Singer Featherweight 221 - Centennial 1851-1951 – The Singer Featherweight Shop

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help with identifing this - probably - Singer 12 knock-off - Victorian Sweatshop Forum