I found this vintage handheld Singer Mini machine on Kijiji. It works perfectly well and sews in a beautiful chain stitch : r/sewing

Vintage Mini Chain Stitch Handheld Cloth Self-Feeding SUN Sewing Machine (061)

This hand held tool is compact, portable, lightweight, and powerful making it excellent for on-the-spot repairs. Repair drapes without taking them down, repair clothing without taking it off, repair bedding without stripping the bed, and so much more! This battery operated machine is great for silks, denim, wool, leather, and crafts. Requires four AA batteries or a power adaptor (not included).

Singer Stitch Sew Quick Handheld Sewing Machine

Singer Sewhandy 20, vintage hand crank toy sewing machine

Antique Singer Miniature Sewing Machine Gorgeous Singer 10 Simanco 1920s

Singer Sewhandy 20, vintage hand crank toy sewing machine

Singer Sewhandy 20

Vintage Singer Sew Handy Model 20 Child's Hand Crank Sewing Machine,VGC Complete

Antique Singer Miniature Sewing Machine Gorgeous Singer 10 Simanco 1920s

Singer Mini Vintage Sewing Machine