The three volcanoes Atitlán (3'535 m), Tolimán (3'158 m) and San Pedro (3'020 m) are situated on the southern shore of the Lake Atitlán. The lake Atitlán is of volcanic origin and was formed approximately 85'000 years ago in a tremendous eruption, that ejected more than 300 cubic kilometers of lava and ashes into the atmosphere.
San Pedro is the oldest of the three volcanoes and became extinct about 40'000 years ago. Tolimán started erupting soon after San Pedro became extinct and has not erupted in historic times, geologists are still debating whether it is extinct or dormant. The Atitlán is the youngest and also the highest of the three volcanoes. It was formed during the last 10'000 years and last eruptet in the year 1853.
The stamp should show a view of the lake Amatitlán. (Lake Amatitlán is another lake in Guatemala). But at the shore of the lake Amatitlán there isn't any volcano. There are some information in the web (Guatemala Filatelica for February-March, 1959, Oswaldo V. Pellecer) mentioning that in fact the stamp is showing a view from Panajachel across lake Atitlán towards the San Pedro Volcano. A stamp with the equal picture was issued 1929.
View from Panajachel across the Lake Atitlán towards the San Pedro Volcano.
Guatemala 1935/1937, Lake Atitlán.
In 1935, the Lake Atitlán stamp was perforated diagonally to create a ½c stamp
Tolimán Volcano (left) and San Pedro Volcano (right).
Guatemala 1935/1937, Atitlán.
The summits of Tolimán Volcano (middle-left) and Atitlán Volcano (middle-right) in the background.
(View from San Pablo la Laguna)
Lake Atitlán. Tolimán Volcano (left) and San Pedro Volcano (right).
Guatemala 1939, Lake Atitlán.
Atitlán Volcano (middle) and Tolimán Volcano (right).
The stamp is existing overprinted "1945 FERIA DEL LIBRO 2½ CENTAVOS".
Guatemala 1950, Lake Atitlán and Tolimán Volcano.
Guatemala 1954, Lake Atitlán and San Pedro Volcano in the background.
Guatemala 1960, stylized view of Lake Atitlán in the background.
The three stamps are showing:
Guatemala's national flower, Lycaste Skinneri Alba (White Nun Orchid).
El Palacio de Los Capitanes Generales in the city of Antigua.
Tikal Temple in the department of El Petén.
Lake Atitlán with Toliman Volcano.
The stamp is showing the Tolimán (foreground) and Atitlán volcanoes.
The stamp was issued is sheets and in a souvenirsheet as well (please see below)
Guatemala 1970, souvenirsheet.
Guatemala 1975, "Custumes of Sololá".
San Pedro Volcano.
(Sololá is a city at the lake Atitlán within the Sololá department)
The stamp is showing the Tolimán (middle/foreground) and Atitlán volcanoes.
The stamp was issued in the series "Earthquake".
The stamp was issued in sheets and imperforated in the miniaturesheet below as well.
Guatemala 1976, miniaturesheet.
Guatemala 1979, coat of arms of Sololá department.
Guatemala 1985, "Boy Scout". San Pedro Volcano.
Guatemala 1991, San Pedro Volcano.
Guatemala 1995, Lake Atitlán.
Tolimán Volcano in the foreground and Atitlán Volcano behind (left).
Guatemala 1995, Lake Atitlán and Tolimán Volcano.
Nevis 2002, Atitlán Volcano in the background, at the left the flank of Tolimán Volcano.
The stamp was issued in the miniaturesheet "The International Year of Mountains".
Guatemala 2002, San Pedro Volcano.
Guatemala 2006, "Atitlán Coffee Growing Region".
The stamp was issued in the series "Coffee Growing Regions".