Grandmother's American Waltham pocket watch

Tricolored gold, bird and flowers on one cover face and flowers boxed area for engraving on the other. about the size of a silver dollar. Watch face reads AWW Co, Waltham. Front and back covers have number engraved 484369' I think. One cover also has a crown engraved inside above the number. The dial face is white with black numerals and a light blue border scallops on the outside of the numerals. A dark pink spray of roses is under the numeral 12. I'm just interested in knowing its origins before passing it along to my niece. It belonged to my Grandmother when I first saw it as a child 55 years ago, but may have once belonged to her much older sister who died at a young age.