BBF lists a HUB4700 automatic clone under the sapphire skeleton dial. Its decorated openworked view is distinct from the Unico HUB1280 layout, while the tonneau case gives the blue ceramic bezel a broader frame. The warm plated steel and cool blue ceramic form the central purchase decision; the structured strap extends the blue without adding another material colour.
The white ceramic 642.HX.0170.RX Spirit of Big Bang is the useful nearby choice: White ceramic is cool and bright; King Gold tone with blue ceramic makes the case warmer without losing blue contrast.
The warm and blue materials give this tonneau watch an evening presence, while the structured strap keeps it grounded in the sport-oriented Spirit of Big Bang family.