I have a question about the 23 jewel 18s Hampden movements..Here is a New Railway with serial# 3351443 were these made before or after the Special railway movements..

Samie,
Your New Railway is a very late example, and is in one of the last runs of the New Railway and indeed of all 18 size Hampden production. There were numerous runs of both New and Special movements made before your watch, and there was a run of Special Railways made after your serial number (3,357,001 - 3,357,500).
While both were made as 23 jewel movements, the Special Railway had a higher grade of finish than the New Railway, and sold for a higher price. Throughout most of Hampden's history, the grades were produced concurrently.
In 18 size, the New Railway was made in 23 and 17 jewel configurations, while the Special Railway had 23, 21 and 17 jewel versions.
When made in 16 size the model 4 and 5 New Railway was only available in 23 jewels, while the Special Railway was a 21 jewel movement. Earlier Model 1 and 2 movements, marked "SR" or "NR" in a flag were made in 23 and 17 jewels.

Thanks Ed for the information i like the look of this one it looks to be a quailty movement..