Never heard of Mimo? You’re not alone. Mimo was one of many Swiss Watch companies that operated from the late 1800s to the mid-1900s. They produced many innovative watches, including (apparently) the first 8-day wristwatch, and the First Ladies digital “jump” hour wristwatch (reference “Finding Memo by Bruce Shawkey, NAWCC Bulletin April 2011). They manufactured wristwatches for the German army during WWI and then disappeared after the war. The owner went on to produce watches under the purchased company name of Girard-Perregaux (who, of course, went on to become the well known high-end luxury watch company).
The pivots were worn on the original balance staff, so a new staff was made.
The stem was severely worn (or poorly remade). A new stem was turned and filed.
The movement was not as pretty as one would like. The plates had weathered well, but the crown and winding wheel had sustaining quite a bit of corrosion over the years. After repair and cleaning it ran well. The dial and hands showing a fine vintage patina.