Dan,
I like what Encyclopedia of the Waterlily (Masters, 1974, p. 453) has to say about Bagdad and have included it below:
Flowers of this hybrid are a wisteria blue, broad and flat, gold centered with yellow stamens, and petioles just long enough to hold them aove the floating leaves. Leaves are of a medium size, light green above with blotches of red and brown, and dark green beneath with purple stripes. George H. Pring, in 1941, described the hybrid this way: "The combination of leaf and flower gives it a rich effect, something like that of a Persian rug." from this feeling, the name bagdad was selected. It is a good propagator and strongly viviparous.
Considering the vintage of this lily, I personally would have a hard time accepting a plant as genuine. It would have to come from someone with some serious "cred" for me to call it Bagdad. I have purchased my share of lilies from various places that drop shipped from reputable mass producers only to receive what were probably seedlings. Then again, I've had a truly named plant that I know came direct from the hybridizer that performed oddly for just me. Perhaps some DNA testing is in order?