Textured copper pendant - twiddles and balls

I have an idea that if I look away from this pendant, the tiny solid copper balls will move, running along the twiddly track to wherever it is that they're heading. 

The pendant is a solid hunk of slightly curved copper, impressed with a deep twiddly texture which is the carriageway to a number of tiny solid copper spheres - like bubbles in a tube.  each ball has been formed by hand and carefully fixed in position with tweezers.

The pendant has an integral polished bail and hangs from a nice quality antiqued copper belcher / rollo chain which fastens with my own hand crafted hook and loop clasp.  The pendant has been antiqued to highlight the spheres against the darker track.  The surface is quite polished and shiny although my diffuse photography lighting sometimes kills the gloss a little.

The pendant drops 41mm (1.6") from the chain and is 23mm (0.9") wide.  The chain will be made to order for you, so you can have whatever length you like, up to 30", so please specify your preferred size in the comment box during checkout.  If no size is specified, an 18" chain will be sent by default.