ca. 1893 Crown Prince & Princess of Romania
Wikipedia has this about the mismatch, "...Prince George of Wales, later King George V of the United Kingdom, fell in love with her and proposed marriage. Marie's father and George's father approved of the marriage, but their mothers did not. Marie's mother did not like the British Royal family and George's mother did not like Germans so the idea of a marriage was nixed. Before Marie could find someone else unsuitable to marry, her mother found Ferdinand of Romania. He was the German raised nephew of the King of Romania (and a distant cousin of the rulers of Prussia.)..."
Sepia tone removed by gogm.