Without exception, every Seeburg E or K that I have seen playing a
xylophone had a J.C. Deagan xylophone tuned to A=435.  It is ever so
slight a drop in pitch compared to A=440.  I would never try to retune
to A=440 an old xylophone that was originally made as A=435.

I have a xylophone in my collection of parts that is A=440 and of the
restorers I have spoken with, none can confirm that they have ever seen
a A=440 xylophone in a Seeburg.

Don Teach - Shreveport Music Co.