Couldn't help myself, always fancied a gold 7750.
Gold 7750 Inbound by Micky Aldridge, on Flickr
I'm still yet to disassemble that ETA with several complications, but having done some more research, it turns out the ETA 2836-2 movement has a module on the dial side, this add on part houses many gears allowing the ETA movement to have manually adjustable complications, what I haven't figured out is, how do those complications register automatically each day at midnight.