The movement is small compared to the caseback. The 215 obviously wasn’t bespoke for this watch. However, I quite like the chunkier look of the case. And, the way I look at it, I don’t see the movement when I wear it, but if I want to get a loupe and admire, and it’s a beautiful thing to behold, then I can, because unlike most Calatravas, there is at least a rear sapphire to enjoy the beauty usually hidden.