Lithuania 1990 PSE02A B002b - postal stamp

Postal stationary envelope (PSE) of Lithuania; 1990; issue "XIII National Song Festival of Lithuania"; real used with additional franking
PSE: Lithuania No. 2A (Reikfil, PZ)
Stamp (PSE): Michel No. 457a as PSE
Stamp (additional): Michel: No. 472 (LT); Yvert & Tellier: No. 409 (LT); AFA: No. 469 (LT); Reikfil: No. 16 (480); PZ: No. 16
Color (PSE-stamp): emerald green to bright grren or pale oliv
Color (additional stamp): greyish yellow green to dark olive green with black
Nominal value: "5 K" (Kopekai) + 15 (Kopekų) = 20 (Kopekų)
The nominal value imprint "5 K" instead of only "5" at the angel-stamps of 1990 occurs only at the PSE variants.

Postage validity (PSE): from 6 July 1990 until 30 September 1992 date QS:P,+1990-00-00T00:00:00Z/8,P580,+1990-07-06T00:00:00Z/11,P582,+1992-09-30T00:00:00Z/11
Postage validity (additional stamp): from 13 March 1991 until 30 September 1992 date QS:P,+1991-00-00T00:00:00Z/8,P580,+1991-03-13T00:00:00Z/11,P582,+1992-09-30T00:00:00Z/11
Postmark: Vilnius, 15 July 1991

The PSE 2A variant represents ca. 5% (other source: 15%) of the total printed PSE issue.