This is a Rolex ref 6424, a simple hand wind watch. According to information from the forum, After the Rolex catalog settled down in the late 1950s, Rolex did not produce large numbers of no-date watches in 36mm cases aside from the Explorer.
In fact, the vast majority of 36mm Rolex oysters from the 1960s through the 1980s are DateJusts and Explorers, and if you want a no-date non-sport Rolex, you generally have to go down to 34mm, where you will find tons of hand-winding and auto-winding references with or without date.
This is a rather special watch as Firstly, it’s jumbo case. Typically, standard oyster precision models come fitted in 34mm cases but with this reference 6424, the case was enlarged to match its Datejust and Day Date siblings at 36mm. It might be a seemingly small detail, but it means a ton. And finally, the plump, original lume plots behind each marker. Like the other details, these dots of tritium might not seem all too important but in the world of vintage Rolex, its stuff like this that makes all of the differen
One notable exception is the ref 1018, which is a great automatic (perpetual) no-date reference in a 36mm case. They are less valuable than the 1016 Explorer, but still highly sought after. The ref 1018 is fairly obscure to the general public, but pretty well known to collectors.
In some ways, you could consider the ref 6424 to be a hand-winding version of the 1018, a no-date 36mm oyster. Another nice thing about the 6424 is the 20mm lug spacing, and the fact that they generally came with a 7206 Swiss rivet bracelet (early examples will not be marked). One interesting curiosity is that the 6424 has non-drilled lugs, so the bracelet endlinks for the 6424 have a cut-out to access the spring-bars.ce.
