1999.06.08    Great Britain
New Scottish Regional Definitives

For the first time, Great Britain regional definitives will give up the traditional Machin images. On June 8,  the new pictorial Scottish and Welsh regional definitive stamps unveiled.  The new ones are multi-colored, this is also the first time in regular British low-valve definitive stamps. Three of the new four stamps for Scottish are non-denominated - 1st, 2nd, and E (for pan-European rate), and the fourth is denominated 64p. The 1st and 2nd stamps show the lion rampant from Scotland’s coat of arms and Scottish national flag respectively, and the 64p stamp features the traditional tartain plaid.
The new stamps do not have the name of the region on them, so the design is the only identifier of the region.
 

Original information from GBStamps.com