Apollo Music Roll Size and Scale Comparison

6 holes per inch, 11 ¼” wide, 65-note Apollo player piano roll.

Boxed 6 holes per inch, 11 ¼” wide, 65-note Apollo player piano roll.

(Photograph courtesy of Jere DeBacker)

Above two images: 6 holes per inch, 11 ¼” wide, 65-note Apollo player piano roll.

6 holes per inch, 15 ¼” wide, Apollo Concert Grand 88-note player piano roll.

Leader for 6 holes per inch, 15 ¼” wide, Apollo Concert Grand 88-note player piano roll.

(Photograph courtesy of Jere DeBacker)

Above two images: 6 holes per inch, 15 ¼” wide, Apollo Concert Grand 88-note player piano roll. Note the cleverly designed logo on the QRS leader tab.

9 holes per inch, 11 ¼” wide, Apollo Red X expression roll.

Leader for 9 holes per inch, 11 ¼” wide, Apollo Red X expression roll.

(Photograph courtesy of Jere DeBacker)

Above two images: 9 holes per inch, 11 ¼” wide, Apollo Red X expression roll. Similar to standard 88 note player piano rolls, Art Apollo rolls, and QRS red X rolls. Note the Clark Orchestra Rolls artwork printed onto the leader tab.

9 holes per inch, 15 ¼” wide, Solo Art Apollo roll.

Leader for 9 holes per inch, 15 ¼” wide, Solo Art Apollo roll.

(Photograph courtesy of Jere DeBacker)

Above two images: 9 holes per inch, 15 ¼” wide, Solo Art Apollo roll. This music roll width was used on both the Solo Apollo with two pneumatic stacks; and the Solo Art Apollo with two pneumatic stacks and automatic expression.

Solo Apollo Automatic Directions for Starting.

(Photograph courtesy of Jere DeBacker)

Above image: Solo Automatic Directions for Starting. Rubber stamped in ink on the Solo Art Apollo music roll leader, the start-up instructions consist of three steps:

1st.Try music at Test-Slots to insure properer tracking, using extreme small apertures only.
2nd. Advance roll past Test-Slots.
3rd. Adjust Tempo lever and turn on power.

(Photograph courtesy of Jere DeBacker)

The image above shows an assortment of boxed Apollo music rolls representative of the different kinds of music rolls made for Apollo player and expression pianos over many years. From left to right:

1. 6 holes per inch, 10 5/8” wide, 58-note Apollo player piano roll.
2. 6 holes per inch, 11 ¼” wide, 65-note Apollo player piano roll.
3. 6 holes per inch, 15 ¼” wide, 88-note Apollo Concert Grand player piano roll.
4. 9 holes per inch, 11 ¼” wide, 88-note Apollo standard player piano roll.
5. 9 holes per inch, 15 ¼” wide, Solo Apollo player piano roll.
6. 9 holes per inch, 15 ¼” wide, Solo Art Apollo expression roll.

Leader for a 58-note Apollo player piano roll.

(Photograph courtesy of Jere DeBacker)

Above two images: 6 holes per inch, 10 5/8” wide, 58-note Apollo player piano roll. In addition to the 11 ¼" and 15 ¼" wide Apollo music rolls mentioned earlier in the article, Clark/QRS also cut the earlier standard 58-note music rolls as pictured above. At the bottom of the roll label for this classical music roll is the wordage: Q.R.S. Company; Chicago, Illinois, U. S. A.