Jeanette: The Belle of the Royal Easter

Her birth coincided with the Great Depression’s and bathed the gloom in sunlight.  She stole hearts for years, then somehow faded to a distant memory from those who had loved her most.  If not for one photo, a nonagenarian’s childhood memories and a fortunate meeting in 2019, she would be lost forever.  Who was she and how did such a beauty disappear from radars?