GUERNSEY. States of Guernsey. 10 Shillings, 1934-40. P-15. PCGS Currency Choice About New 55 PPQ.Scarce. An exceptional note, with beautiful color that bears one of the harder dates of 1937 to find this type in. Known among seasoned collectors and hobbyists as the "Robins Egg" note, this piece is truly a pleasing marvel for its rarity, and color. Completely original.PCGS Currency Choice About New 55 PPQ.