Prince Christian 18 years. Date cancellation stamp 1 value. HRH Prince Christian turned 18 years old on 15th October 2023. Royal photographer Franne Voigt took the photograph of the young prince wearing the white anorak. The stamp is printed in offset and is also available as a souvenir sheet and a stylish souvenir folder. Face value / post office price: 50 DKK. Date of issue: 15th October 2023