Butterfly - Guernsey Post

showing two sets of [4] FDCs issued by Guernsey Post.  The covers were issued under WWF on butterfly of Guernsey.  Values 26, 37, 18, 25 cents.

The portion showing stamps and the WWF post mark dated 12-2-1997 are cut off and shown below for a clear view of the butterfly / moth and the post mark available. The post marks have butterfly picture in it.  Comments welcome