The closest match I could find on this website for this watch is the 1941 Arnold. The only two differences that I can see are that: 1) the bezel is soild on my watch rather than the decorative/engraved bezels on the other Arnolds I could find on this website, and 2) the face on my watch has a yellowish/goldish tone to it rather than the white face I've seen on others.
I have not opened the watch to see the movement and/or symbols inscribed within. The only writing on the outside of the watch is the serial number (1384580) which I believe indicates the watch was made in 1941 or 1931 since there is no other external code. Furthermore,the word "bretton" is inscribed on the inside of the watch band. Upon winding the watch just once or twice, the second hand does move for a short while, which would indicate to me that it is in working condition, although perhaps in need of a tune up. There is also some corrosion where the watch band meets the case on the underside. Case dimensions are approximately 27mm wide by 37mm lug to lug.