DescriptionFIN 1974 MiNr0556IIy pm B002.jpg	Stamp of Finland; 1974; definitive stamp issue after new introduction of the currency; stamp drawing of the so-called issue "Lion type m/63 - plate II" (= Finnish lioncel on ruled background and value numbers circle with squared pattern formed by inclined lines; nominal value circle with small white limiting circle; flower rosette over nominal number circle more line intensive filled; postmarked) Stamp: Michel: No. 556IIy Color: blue to blue violet on luminescent paper Nominal value: 0,05 (Markaa) Postage validity: from 7 January 1974 until 31 May 1994 date QS:P,+1950-00-00T00:00:00Z/7,P580,+1974-01-07T00:00:00Z/11,P582,+1994-05-31T00:00:00Z/11 Stamp picture size: 17.5 x 21 mm (= outer rectangle frame, breaked through by the nominal number circle)
Date	7 January 1974 (first issue day of the stamp)
Source	scan of original
Author	Postal administration of Finland (Posti)
Permission (Reusing this file)	Public domainPublic domainfalsefalse This postage stamp published by Posti- ja telelaitos before January 1, 1990 is in the public domain in Finland because it has been extracted from a decision or statement issued by a public authority in Finland and is not an independent work. Section 9 of the Finnish Copyright Act specifies that no copyright exists in such material. (Link to the Act). See COM:Finland#Not protected and COM:Finland#Stamps. The document containing the decision or statement has been uploaded to Wikimedia Commons at [[:Error: |source=file name not specified.]] This template does not apply to postage stamps first published after 1989. Because Posti- ja telelaitos was changed from an authority to a company in the beginning of 1990, postage stamps published by Posti- ja telelaitos were not anymore part of decisions by an authority. Most probably the copyright owner of postage stamps published after 1989 are Itella Oyj or the designer of them. All postage stamps first published after 1989 marked with this tag should be speedily deleted. Deutsch | English | suomi | français | magyar | македонски | русский | +/−
Other versions	The same stamp, but print plate I and normal paper (Michel No. 556Ix from 1963) To two of the differences between print plate type I and II at this stamp

Notice: To the varieties at this stamp series:

• Recess printing: plate type I (used 1963, 1974-76): wide white limiting circle around the value number circle; flower rosette over nominal circle little filled with color lines; the "O" and "U" at "Soumi" are separated by a full white line
• Recess printing: plate type II (used 1967,1968, 1972,1974): small white limiting circle around the value number circle; flower rosette over nominal circle more filled with color lines; the "O" and "U" at "Soumi" are separated by a broken white line
• Offset printing: used 1972/1974 (only applied at nominal value 0,05 Markkaa, blue violet)

To the most of these print variants exist the paper varieties:

- variant x: normal paper (issued 1963/1968)

- variant y: luminescent paper (issued 1974/1975)

Sometimes is used the term "phosphorescence" in the catalogues for the luminous effect at these stamps. However, without to explain nearer these phenomena, be mentioned:
- "luminescense" = generic term for the entire phemonenon (differenced according to his origins)
- "fluorescence" = light emitting without temporary retardation
- "phosphorescence" = light emitting with visible temporary retardation
The luminescent stamps show in the UV light weaker (white) luminescence on the printing side, light violet on the back.
Sometimes is differenced still additionally according to color shades.