BBF describes a HUB4700 clone based on a 7750 architecture within a tonneau sandwich case. Resin flanks divide the rose-gold-tone metal surfaces, so the case shows depth from the side instead of reading as a single plated shell. The synthetic-stone bezel then adds light at the front; it is a different visual role from the openworked movement behind it.
The white ceramic 642.HX.0170.RX Spirit of Big Bang is the useful nearby choice: White ceramic keeps the Spirit clean and graphic; rose-gold-tone surfaces and a stone-set bezel make this version an evening choice.
The warm tonneau case and light-catching bezel are made for evening settings, while the rubber strap keeps the watch from feeling like a formal jewellery piece.