C. Realistically decorated as a mouse with onyx eyes, the body entirely inlaid with split-pearls, with black champleve enamelled separations. Chased gold paws and meshed gold tail. M. Gilt brass shaped with going barrel and fly regulator, driving the two small knurled wheels imitating the realistic movements of the mouse, running forward, then rising its legs to pivot on itself and running back to its starting point. Dim. 53 X 17 mm, excluding the tail.