Ingersoll has been around a long time, initially American, with American and german design tones, from what I can tell around 40 years or so it dissolved. Whilst some offices remained in the U.S. (they state New York)the company moved to somewhere in China,probably Hong Kong there is a bit of info. from various internet sites; but as with a lot of these mewby Chinese watch companies the actual history is vague; suffice to same different forums do come up with different variations on the subject.
As I own or have owned five of these watches I can say that the movements so far have been , mainly Miyota, autos from the 8215 variants and have been quite good. The one quartz is Ronda , a swiss made movement which is also good. I am not sure on this one, but even if it is Chinese at this price point I would not worry , the watch guys on this site do say that Seagull is a reasonable make.
Just because some label it as a "mushroom brand" doesn't mean it's not any good. There are some of these "micro " or "mushroom" brands that are excellent , and sometimes quite expensive. Personally for a company that produces so many watches I would not consider it this type of brand.
For $79 just try it,if you like it.