This striking set of postage due stamps from Guernsey Bailiwick, issued in the early 1970s, features bold denominations ranging from 5p to 15p. Each stamp depicts Castle Cornet overlooking St. Peter Port Harbour, an enduring symbol of Guernsey’s maritime heritage. The designs, printed in vibrant monochrome shades—turquoise, orange, violet, brown, and grey—reflect a consistent layout emphasizing clarity and utility. Intended for handling underpaid mail, these stamps now hold strong philatelic appeal for collectors interested in Channel Islands postal history and definitive overprints.