I am seeking advice for the proper adhesive to use to reattach a loose (and
partially torn) paper label to on instantaneous lacquer disc recording. 
What is left of the label credits "Radio Recorders, 7000 Santa Monica Blvd.,
Hollywood, CA" which I think was a professional remastering concern.

On the reverse (where there are no grooves at all) there is a circular stamp
in the center by the drive pin holes in pink-red ink that (I think) reads
"TRANSCO USA Transcription Disc" (I am making a guess at the fourth letter
in "TRANSCO" and I am guessing "Transcription" even though all the net
remains is "… tion".

There is some palmitic acid accumulation around the circular cutouts in the
disc's sleeve, which convinces me that the disc is cellulose nitrate (the
substrate could be aluminum or glass; it seems too light to be steel, and to
inflexible to be fiber or paper).

In case anyone is curious, the label only says "Yankee Valor Trib…" [The
rest is torn off].  I note on page 22 of the Spokesman-Review of Spokane
Washington of Friday, July 25, 1947, there is an article about a
thoroughbred racehorse named "Yankee Valor" dying the previous day after
winning a race in the Hollywood Derby.,3628482&hl=en

The sleeve that came with the disc has handwriting reading, "Gold Cup Yankee
Valor death of horse."  Yankee Valor was to have run in the Hollywood Gold
Cup race on Saturday, July 26, 1947, according to the article.

Anyway, information on best practices to reattach this label would be
greatly appreciated!

--Mark Hendrix