Anyone have an idea which Hampden railroad grade is the rarest, or at least hardest to find? I think it would be the 16s 23J Special Railway model 5.For such a "late model" Hampden, they seem as rare as hen's teeth.They almost never show up for sale,but they are a really beautiful watch! Another Hampden that should have been a big hit but apparently never gained the popularity it deserves...Ted.

Scarce 23j 16 size Hampdens

Here is a listing of rare Hampden size 16 RR watches. Several are much rarer than the Special Railway which is a rare watch itself.