I know it's not a SIMANCO Singer, however at times, some foreign companies tried to get by using the name. I also think it looks European, mostly because I pay attention to US made machines, and this one is different. BTW - Did Singer make any ones with the shuttle going back and forth in that direction? The underside shows it's a straight path, not an arc. I know Singer has some side to side that traveled a straight line.
I do not think this was originally sold as a "child's" machine. But there is a much larger (and higher$$$ ) market for "toys" than adult machines.