Hi, I recently bought this watch, I knew straight away that it was a high grade movement, but after some investigation on the Internet, I think it is a 19 caliber movement, made around 1920, I belive it is second from the top movement, can somebody tell me how rare this movement is and what grade it will be, it is 9ct gold dennison case, 21 jewel movement

 

Solid 9K gold case made by A L Dennison in Handsworth, Birmingham, England. hallmark letter dates to 1921 so your date estimate is pretty good.