These 21 jewel “Santa Fe Route” watches back in the day were made from a Grade 806 movement which is a very high quality movement. They are Railroad approve at Class G. They weren’t for full Railroad use due to only being adjusted to 3 positions. Case: Illinois “Salesman Display” case with snap off bezels. Outside D : 52 mm. Please use the photos as a big part of the description and please contact me with any questions.