Keeping up the current retro LCD watch is one that I know very little about, including how old it actually is.
The watch is a solar powered LCD watch. It has a large 4 digit LCD display (but can only show up to 12 hours so no 24hr display). The top half of the watch is dominated by the solar panel, with the bottom having the LCD display. Below the display is a large grey button which switches between time, date, and seconds options, and a small inset button for setting the watch.
Strangely, when the watch LCD is covered, the display disappears, but also the time pauses, meaning that it ran slow over the day. This could be because of a problem with the rechargeable battery though.
The shape of the watch with a narrower 'waist' resembles the water powered watch I have blogged previously.
On the watch it has the name Marathon 5 above the LCD display. I haven't found anything about this name, but there is a company called Marathon watches which started life in 1904 as the Weinsturm Watch company, before one of the Wein family formed Marathon watches in Montreal in 1939. This company is still running, making watches in Switzerland, Canada, and the USA. I don't know if they have anything to do with this watch, but it's the closest match I've found.