The Nabucco Cuore Caldo is a limited edition split-second mechanical chronograph with power reserve indicator. The company will only produce 500 pcs of the model.
I haven’t seen this before but it seems pretty obvious enough for it to have been done before - Eterna’s new Kontiki watch has lumibrite (glow in the dark) triangles with the number in the middle that appear as silhouettes when you view it in the dark.
