I attended an estate auction today. Bought a Necci 523 sewing machine for $5.00. Oiled it, seems to sew just fine, did straight and zig-zag stitches. On the back it says Made in Taiwan. My guess is that is fromthe 70's. It does have a metal case. The machine itself is tan, with the stitch info in orange and brown. Anyone have any info about this machine?