Would Danco be the other one?
Would Danco be the other one?From what I can see, no.
More pictures would help, but I'm not seeing it clear the filler neck in the rear.
Not sure which manufacturer this is, but it's not the Femco. JD parts catalog 4250 details it.
There was a Cozy, OTC, and Femco (and it seems like one other) made for the 300 series.