Same Stamp - Different Value

United States
Greetings from America set of 50 stamps
34c - April 4, 2002
37c - October 25, 2002
The stamps show greetings with iconic scenes from all fifty states. Only 6 examples are shown here.
The smorgasbord style design was created with the help of computer graphics. The self-adhesive stamps were printed at Sennett Security Products of Chantilly, Virginia using gravure process.

Rhodesia
Definitive Issue 1970 - 1973
Three designs were reprinted with new denominations.
Top row: the 1970 print, bottom row: the 1973 print.

India
Definitive Issue
Three designs (electric locomotive, Bhakra Dam, Trombay atomic reactor) of the 1965 series were reissued in 1976.

Sweden
European Nature Conservation Year
May 11, 1970
The design features the River Trångforsen in Ljungan, Jämtland.

Finland
Air Mail stamps
1950 - 1963
Douglas DC-6: 1950, 1958, 1963, 1973
Convair 440: 1958, 1959, 1963, 1970

Like that Finland airmail set KuoLC5310. Have a couple but will have to look for the others I am missing. Makes collecting interesting when there are varieties and overprints issued like this.

KuoLC5310 - Your post of 02/24/2016 7:23 pm features a rather unusual multicolour pair: Sweden, European Nature Conservation Year, May 11, 1970.

I have been trying to spot any differences in the identical colour scheme between the two stamps in my collection and indeed there are very very few and, moreover, these are minute. The most conspicuous one appears to be the small parallelogram below the letter S in the inscription NATURVARDSARET: the parallelogram consists of blue lines in the 55 ore value while that in the 70 ore one has lines which are violet in colour.

Strangely enough, your pair presents the same differences as mine.

A most remarkable set for the printing process used. Could anyone provide more information about it?

Note the misregister visible along the left frame of the 55 ore value where only the intaglio in black and violet appears. The set in my collection does not present this printing defect.

Please discuss technical details regarding this issue on the Stamp Production Process Forum in the Sweden, Europ. Nature Conservation Year 1970 issue Question thread.

Cheers!

Argentina
Landscapes - Moon Valley
1975: 50 pesos
1977: 300 pesos
The denomination reflects sharp inflation following the Rodrigazo in 1975.

Australia
Definitive Issue - Birds
1964-1965: pre-decimal currency
1966: decimal currency

Mexico
Definitive Issue - Nature Conservation
Forest Conservation
$1.00 - February 2002
$4.50 - August 2004
$6.50 - January 2005
$8.50 - December 2004

Mexico
Definitive Issue - Folk Art
Seri basket - $10.50 (2005-2008) and $11.50 (2010-)
Silver Gourd - $13.00 (2005-2008) and $13.50 (2010-)

Quiet common in colombian philately, the higher value stamp can usually be found on souvenir sheets. Here some examples: