I bought this Singer 15 NL machine, too, but the funny thing is bought it *in Taiwan*. I talked to the shop's owners before buying and they assured me that Singer had a factory here years ago and the machine is legit. (They've been in business for about 60 years and were open during Taiwan's textile heyday.) My machine was made in the late 70s (the booklet that came with it is dated '73).
I'm not singing the machine's praises though! It's terribly loud. And tonight I broke a needle and now I can't get the stupid bobbin to catch. Argh.
By the way, Taiwan isn't China and "Made in Taiwan" means something very different than "Made in China".