What the heck is this - Hamazawa 5023A

[Geotex]

For the majority of its lifespan, the Benrus company used primarily ETA movements in its bread-and-butter mens watches, up through the era of the 2750 family. Their second-tier Belforte line made the jump to Japanese movements (Seiko-made but branded as Qualco) first but then the main project lines went over as well, right before the quartz crisis finally took down their sale of any manual movements. 

If your dial is original and the watch is legit, it must have been one of the last gasp products that used the Benrus name but really had little or nothing to do with what went before - I think of these as "Benroids." There are also a lot of outright fakes with Benrus on the dial but nowhere else on the movement or case that are fitted-up with generic ST96-type movements. So depending on what bare Benrus movements you have, the ability to fit them up in a case like this would vary.