A Rococo Clock with Sirens, Putti, Masks, and a Bird of Paradise Pointer 

This pen-and-ink drawing by Giovanni Bettati, an Italian artist from the 18th century, is a design for a Rococo clock. The design is characterized by elaborate, asymmetrical ornamentation, including putti, masks, and a bird of paradise pointer. These elements are arranged around a circular clock face, reflecting the Rococo style's emphasis on elegance and playfulness. This design was likely created for a wealthy patron, as the Rococo style was popular among the aristocracy during the 1700s. The drawing is a testament to Bettati's skill as a draftsman, showcasing the intricate details of his design. The drawing is also a fascinating glimpse into the decorative arts of the Rococo period, revealing the artistry and craftsmanship that went into creating these luxurious objects.