Pair of miniature bronze vases with salamander stones, registered trademark 19th century

This pretty pair of bronze vases is from the 19th century, it is a napoleon III work of asian inspiration. On the top there is a butterfly, a salamander on the bottom with stone settings. The whole is in gilded bronze with a pretty gilding. We managed to decipher the marking: "ht trademark". However, we report friction and wear, scratches and micro-scratches. Note that the vases are slightly blackened. There are black spots on the tail and under the head of the salamander. The small butterfly on the top of the vase moves slightly. For the condition, please detail the photos. Do not hesitate to zoom in. The photos are an integral part of the description. Dimensions: height: 10.5 cm top diameter: 3 cm bottom diameter: 3.5 cm e611.