The Rolex Submariner 1680 is a good choice for you to enter the world of vintage Rolex. Produced from 1966 to 1981, the Rolex 1680 has a date display window as well as a Cyclops date magnifier. These are what the 5513 does not have. Also notable is that the 1680 has the chronometer status.
The Rolex 1680 Red Submariner is named because the letters Submariner are in red. These watches are around 80k to 100k in the market. A normal 1680 great white can be had at around 50k. The most special thing about this watch is that it has a acrylic crystal which sits quite high above the bezel. It has bezel edges but it is not domed like the 5513.
Also notable is the font used on the date wheel. These old-style fonts give the watch a rather retro feeling as modern fonts are very different. The crown of the 1680 is a triplock crown which ensures 200m water resistence. Most 1680 watches have Maxi dials. The dials of the 1680 differ according to the year the watch is produced. The fonts and the spacing can be different and please beware of that. The dial of the right period has to be paired with the case of that period accordingly.
The Rolex 1680 is a very good entry level vintage Rolex. It looks different from those massively worn 16610 and 116610. If you want to add some chic to your style, it is your best choice.