nisus watch

obtained this watch in 2008, (came from my great uncle, dont know how long he had it either) i dont know anything about it and am curious to learn more. i havnt been able to find anything to date on it either, not even a proper picture. anything info related about it would be very much appreciated,
i dont know if its clear on the photo, but it has nisus under the 12, and in very small writing under the 6 it has 'swiss'. on the back of the watch it has: incabloc, swiss made, waterproof and antimagnetic on it.
on the inner of the strap it has:
made in germany
pat. 1027002
rolled gold
plaque or lamine, fonds acier inox then a diamond shaped logo with rw in it (i think, its hard to see)

i think thats all about it that i know and can find, any info would be appreciated, or a reference on where to look further