Wikipedia says that Arcadia was a brand of Fleurier Watch Company of Switzerland, which jibes with information on the movement. They did stamp the Fleurier name, that it's 7 jewels, and it's adjusted two ways. Interesting to me that it's adjusted but only 7 jewels. Wikipedia further says that Arcadia was the high end of their five brands, but again—only 7 jewels? Unfortunately there's no serial number and no way I can think of to estimate its date of manufacture.
Regardless, it's a nice watch and it still runs; happy to have it. The case is a Wadsworth "Rambler," warranted for 10 years.
Acquired: 2019
Circa: likely early 20th century
Current condition: runs fine