6 Harness Loom

I just bought a very old jack loom from a woman who had bought it 16 years ago and never used it. I had thought it was a 4 harness from the pictures she had posted but when I got it home and really started looking at it I discovered it has 6 harnesses and 6 treadles. It has the slight remains of a blue-ish label that was once on it but is now unreadable. I've never seen anything like this. Any ideas? Thanks!