These frog salt and pepper shakers were designed by Edouard-Marcel Sandoz for Haviland & Co., a Limoges France porcelain producer; circa pre-WWII (1920s-30s).

As you can see below, they were produced in a wide variety of colors.

Limoges frogs salt and pepper shakers designed by Edouard-Marcel Sandoz for Haviland & Co.
Limoges frogs salt and pepper shakers designed by Edouard-Marcel Sandoz for Haviland & Co.
Limoges frogs salt and pepper shakers designed by Edouard-Marcel Sandoz for Haviland & Co.

To the right you can see the maker's mark of Edouard-Marcel Sandoz, who was a Swiss animalier sculptor and painter that worked mainly in Paris during the early 20th century designing many human figural and animal models for porcelain manufactories including Haviland & Co.

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Limoges frogs salt and pepper shakers designed by Edouard-Marcel Sandoz for Haviland & Co.
Limoges frogs salt and pepper shakers designed by Edouard-Marcel Sandoz for Haviland & Co.
Limoges frogs salt and pepper shakers designed by Edouard-Marcel Sandoz for Haviland & Co.