19th c? I would have guessed earlier
Yes, it is a strange mystery. The reasons I thought of the Singhalese connection was directly because of the strange 'collar' design of the neck on yours resembling some kastane hilts, plus the positioning of the ears on yours again similar. Many of the designs for the hilts were, much like kris hilts, very abstract. The Shri Lankans used many symbols of stylized lions in their art, weapons, currency and, of course, flags. Furniture, by the same token, began using lions as claw feet in the early Baroque period. I was hoping someone far more knowledgeable would swoop in to help us at this point!