My first Benham silk FDC! I like how the stamp shows more realistic archaeology, the cover may be flashy but the stamp is not. A rescue excavation in 1980 unearthed the Samian ceramic bowl shown on the stamp. This stamp was 1 of 6 released in conjunction with The Society of Guernsey's centenary in 1982. Is the image on the left Vale Castle?
Same issue on PHQ, from a set of six. Issued: April 28 1982.