Music on Stamps is a collecting stamps is a great hobby. I have enjoyed focusing on stamps that depict musical instruments, especially pianos and organs, composers, and anything else that is music-related. Being a church organist, pipe organs were of great interest to me, so I have tried to expand the collection by getting any kind of postal material with pipe organs.
Brazil #893 was issued on July 16, 1959 to commemorate the 150th anniversary of the Carmelite Order in Brazil. The design features the facade of a pipe organ.
Thankfully Handel Cecilio has written a dissertation on the organ. A good picture is found on pages 56 and 57 of his work which is available online: http://www.archive.org/details/TheEighteenth-centuryPipeOrganAtTheCarmelChurchInDiamantinalts
