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

Singer Miniature Sewing Machine

Singer Miniature Sewing Machine

Singer Sewhandy 20

The new SINGER Stitch Quick + is a portable mending machine for handheld or tabletop use. It is cordless and battery operated, and its slim, ergonomic design provides balance and control for sewing and mending projects on the go. A safety switch allows for easy toggling on and off in handheld mode, or it can be set to stitch continuously in tabletop mode. Additional sewing notions can be stashed in the built-in storage compartment.

Singer Stitch Quick

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

Singer Sewhandy 20

Singer Miniature Sewing Machine

Vintage Singer Miniature Toy Chain Stitch Sewing Machines model No. 20 – Iapello Arts & Antiques

Rare Singer Model 24 Chain Stitch Small Sewing Machine For Sale at 1stDibs singer chain stitch machine, singer sewing machine vintage, value of antique singer sewing machine

Singer Miniature Sewing Machine

Singer Sewing Machine Vintage 6211C Zigzag With Original Box Made in Brazil