1969 Ships, Sandringham CDS

15th January 1969, Ships. GPO cover with Sandringham CDS, typed address. An excellent postmark with the Royal Family having many historical & modern connections to the Royal Navy. The Post Office at the royal residences like Sandringham are only in operation when the Royal Family are in residence. As Sandringham is traditionally there Christmas & New Year residence, only issues at this time of year can be found with this scarce postmark.