After some research it appears that the phase tone I’m looking for is the maestro ps-1a. What caught my ear is the phase shifter tone on the violin and rhodes by the Mahavishnu Orchestra. Between Nothingness & Eternity, Lost Trident Sessions and other live releases and videos from '72-'73. I also believe it was used on Visons of the Emerald Beyond.
I see that the maestro is 6 stage, as well as the Moog. Also that Moog began making the pedals that maestro used to make in the early '70s or something. Does anyone have any experence with the 2 phasers and how similiar that may be, or how capable the Moog is to emulating the tone of the maestro?