Strange that someone would go to the trouble on an old and small yacht where sail handling is already fairly easy.
Still can't see where the actual furler drum might be. One would have thought that unless it was a very expensive bespoke screw system worth more than the boat the drum should be visible above the gooseneck which would also waste a fair bit of sail area between the boom and the tack.
Not in evidence in this picture where the standard headsail furler is visible and useful for scale(although rather high of the deck).
