Santo Domingo, Yanhuitlan, Oaxaca (Mexico)

This is one of two high-value stamps from the set of six, $13.50. It shows the organ in the Santo Domingo, Yanhuitlan. the church was built in 1548 and the organ in 1700. Like many instruments of this locale and era, the instrumenthas a single keyboard of 45 notes and no pedal division. The instrument was work done in 1886 (an inscription inside the instrument), and again in 1996-1998 by Pascal Quoirin from France. View more information about the instrument at the IOHIO site here.

Mark Jameson's article gives this specification:

Left hand
Flautado mayor 8'
Flautado bardon 8'
Octava 4'
Tapadillo 4'
Docena 2 2/3'
Quincena 2'
Diez y novena 1 1/3'
Veintodosena 1
Cimbala 2/3'
Lleno
Trompeta real 8'

Right hand
Trompeta real 8'
Clarin claro 8'
Flautado mayor 8'
Flautado bardon 8'
Octava 4'
Tapadillo 4'
Docena 2 2/3'
Quincena 2'
Diez y novena 1 1/3'
Veintidosena 1'
Cimbala 2/3'
Lleno

("Lleno" seems to refer to a sort of combining stop of several pitches.)

San Andres, Zautla, MEX (IOHIO)

One of two middle-value stamps from the IOHIO set, this shows the organ in San Andres Church in Zautla, Oaxaca. The church dates from the 17th century and the instrument from 1726. The IOHIO site divides organ history in Oaxaca into four periods; this instrument is placed in the first/earliest. The site also reports that there are faces painted on at least some of the facade pipes, making it a polychrome example. The case was restored in 1990 and the rest of the instrument in 1996 by Susan Tattershall. This stamp also has an "error" stamp associated with it. On some copies of the stamp the final "s" is missing for the word "Instrumentos."

Mark Jameson gives this specification of the instrument in his OCJ article. As with many smaller instruments this one has no unison pitch stop; the lowest register is a 4' flute. The single, 45-note, keyboard is divided. There is no pedal division.

Left-hand
Flautado 4'
Tambor
Veintidosena 1/2' - 1'
Diez y novena 2/3'
Quincena 1'
Octava 2'

Right-hand
Flautado I 4'
Pajaritos
Octava I 2'
Docena/Octava 1 1/3' - 1'
Flautado II 4'
Octava II 2'

An excellent summary article by David Warren Steel has includes information about each of the organs in the 2013 set of stamps, as well as photos.