A drawing by A.G. Hill, as printed on page 161 of the 1905 book (the date means it is in public domain now) The Art of Organ-Building, Vol. I, by George Ashdown Audsley. Traced by potrace 1.12.
Organ Case with Hidden Pipes free icon was designed by AdamStanislav for icons Png and presented to its users.
AdamStanislav
3/3/2018