Two Unfinished Elgin Movements

This is a pair of unfinished Elgin pocketwatch movements that were taken from the factory before it was torn down. These are both 16 size convertible movements, and for the watch nut (or maybe just the Elgin nut) there several interesting things to note. 

These two uncompleted Elgin 16 size convertible movements have no decoration, obviously, but there are also completely rough. There is flare around some drilled holes, some hole are not yet threaded, and some holes are completely missing. For example, we see that neither of the two stem hollows and openings exist.

Here is some information on an example of one of Elgin's several 16 size convertible grades.

Each unfinished movement is stamped on the dial side of the base plate with a partial serial number consisting of just two digits.

I'm not sure it's possible to tell what grade these are, and when they were made. But here is some more information about one convertible Elgin National Watch Company grade.

Also, find more examples here.