"The majority of the dial is an open-heart cave in the shape of a light bulb."
A light bulb? It's a skull, on a skeleton watch. Why would they make a light bulb shape? The contours of the shape don't particularly follow anything in the internals of the watch (normally partial skeletons expose the entire balance wheel, which this doesn't), so it was obviously a specific decision to do that shape, and that shape is not a light bulb.