2 Sri Lankan lime vessels called Killotaya. 

Victorian period, British Ceylon, 19th century.
Copper - Brass
10.5 cm x 8 cm x 3 cm x 43 cm with spatula
11 cm x 7,5 cm x 3 cm x 39 cm with spatula
 
They are of round and flattened form, and of two articulated halves. It was used to hold and carry lime (chunam) to be mixed with areca nut slices for betel chewing. In Sri Lanka, these boxes were known as killotaya.
 
Finely decorated on both sides with central floral motifs.
A copper chain and a white metal chain are attached with a spatula used to scrape the lime from the box and spread it on the betel leaf. The interior has remnants of powdered lime. (The powdered lime was obtained by grinding shells and coral).
The shape is reminiscent of, and was certainly based on, a European pocket watch.
Betel chewing, which was used as a mild social drug, was widespread throughout Sri Lanka. Almost every adult man and woman on the island would have chewed it in the 18th and 19th centuries. Lime was an essential component of betel quid. Hosts always offered betel to visitors, but everyone had to bring their own lime.
 
Good condition. One of the screws on the hinge has been replaced.
 
A few chips, breaks, cracks, ...