To be honest I don't know, but if I was going to attempt this I'd probably use a de-solvent and artist's fine tipped paintbrush to carefully peel the rubber away then after the 'operation' use non water based spirit gum to glue it back down, starting from the middle with my fingertips and pushing outwards to avoid getting any trapped air bubbles. Due to the size of the internal mechanism, I'd imagine it would be powered by your average digital watch sized battery?. Please post your efforts (with pictures) if you do so we can at least see how it's powered. :thumbup