Stumbled across a website http://www.bsnpubs.com
which has discographies of all the US record labels. It was interesting looking at Elektra Records and seeing the other albums they were releasing and promoting at the same time as Queen.
Here's the site for Elektra http://www.bsnpubs.com/elektra/elektrastory.html
It includes a history of the label. Didn't realize that Jac Holzman, the head of the label, retired not long after signing Queen.
At the bottom of the Elektra Story are links to the Elektra discographies. I'd forgotten that Jazz was released twice (with two different catalog numbers), first with the poster and then with a postcard to get the poster. Only in America, I guess.
It's interesting to note that Queen II was the last of the EKS-75000 series, and A Day at the Races was the first of the 6E-100 series.
Intoxicate your brain with what I'm saying