Great set of notes there, BK. The photos and the near-solving of the mystery are wonderful.
That was my first Du-Par's, discovered in 1972 when I had only recently moved to L.A. I loved the place, and the style of the building itself. I'm surprised to see they were still there as late as 1978, but how sad to see the reduced architecture. But I would have guessed we lost that Du-Par's even earlier than that.
The store to the east, Adray's, was a large discount store where I bought a nice cassette deck and maybe one or two other things in the early 1980s. This of course was in the days before the big box type of discount stores we know now, and I was always thrilled to walk in there to browse or to buy.
The middle photo would have been taken from right in front of the El Rey, if I'm right about it being in the block east of Burnside.
Anyhoo, congratulations on the Kiru research so far. Wonderful stuff.