|Princess Bertha with Princess Sieglinde|
|Big sister Princess Karoline holds Princess Sieglinde|
both images: Marlene A. Eilers Koenig collection
The infant princess is wearing a long white gown in both postcards, which leads me to think the original photos were taken on the occasion of Sieglinde's baptism, and published as postcards.
She married at Detmold on December 6,