[ Ref. Bill Koenigsberg in 160117 MMDigest --

Bill, I have two Duo-Art test rolls:

1. Test Roll #3 1927, a recut from Frank Adams, was purchased circa
1977.  The leader explains (via Frank) that the test roll it was
created to accompany the Duo-Art Audiographic rolls.  That test roll
has extensive sepia-toned graphics explaining testing procedures.
Frank Adams states that this roll is the first time the 1927 test
roll was recut.

2. Test Roll DA-1002, also marked #3, is a recut I purchased from
QRS circa 1977 or 1978.  The leader states, "See the 1927 Duo-Art
Reproducing Piano Service Manual for illustrations and instructions
referred to on this roll".  Compared to the Adams roll, very few
graphics or instructions appear.

I never compared the QRS and Audiographic test rolls by overlaying
the paper to compare perforations -- an interesting future project.

Ray Bauer - in the Dayton Valley east of Carson City, capitol of
Nevada.