This project is is a grade 63, 18 size, 11 jewels, made about 1874. It is a G. M. Wheeler model. This grade is also found in a 13 jewel version, having the center pivots jeweled.
The design is "transitional" in that it can wind both by the stem and with a key. The beveled pinion for stem winding is visible here. The key wind arbor is shown below.
This is one of those Elgins with a unique lever setting mechanism that moves a hoop-like gear, with teeth on the inside, against the cannon pinion. It is a clever design, but it was short lived. It can be hard to get these to work. The tension against the cannon pinion is low and tends to slip. This watch worked perfectly however with no trouble.
Here is the lever extended for setting mode. Note how that center ring shifts to engage the cannon pinion (not installed yet in this image).
The album for this project is here:
https://photos.app.goo.gl/zZCSNDnGmh6i33keA
