My Morse Fotomatic IV is left homing, but it's so neat I'll keep in anyway.
It's only zigzag machines that may be left homing, and Singer 15 clones are straight stitch machines.
And if it took different needles, then it's not a Singer Clone. It's not just the outside that makes it a clone- it's that the mfg used Singer's design. Other companies may have tried to copy Singer and produced a machine that looked similar on the outside, but it's in no way a "clone" as the insides are different.