I have a used black Olympus OM-1 MD 35mm SLR with Olympus f.Zuiko Auto-S 50mm f/1.8 lens. The shutter speeds sound correct (accuracy not determined). The lens clear under normal lighting conditions with some dust particles which will not affect the image.When a super bright light is shone through, this is a few small fungus spots. There looks like a chip in the prism which will not affect the image. The self timer works as expected. The shutter, mirror and interior look good. The film interior is clean. The light seals look usable, but could be replaced (cheap replacements on Ebay). It requires a 1.35V Wenn battery, easily found. I tested the light meter with a 1.35v mercury battery (not included) and it responded as it should to light.
Included:
Hoya 49mm Skylight filter
Camera case bottom
The instruction manual can be found here:
https://www.cameramanuals.org/olympus_pdf/olympus_om-1.pdf