Doccia porcelain factory, Italy, circa 1755 - 60.
Each measures approximately 8.3 x 5.8 x 4.8cm.
Both mounts are in perfect, unrestored condition.
The Victoria and Albert museum has an identical example in their collection, accession number: 3887A-1853 and also a similar but not identical model, accession number: 3887-1853.
https://collections.vam.ac.uk/item/O333871/furniture-mount-doccia-porcelain-factory/
https://collections.vam.ac.uk/item/O1137574/furniture-mount-doccia-porcelain-factory/