Tamron 35-70 standard zoom, small, fast and convenient

In for a penny, in for a pound they say and while on the look out for a cheap standard zoom to match the 75-150,  I spotted this in a bundle

This is actually really good a seven element, seven group Tamron type 17A 35-70mm constant F3.5 zoom with a 1:2:8 reproduction ratio at the 70mm end complete with Olympus OM mount and even a Hoya 1A filter fitted.
Serial # 556389
It only weighs in at 330 grams which isn't bad while the viewfinder image is fairly bright making it handy for quick picture taking where changing lens isn't so easy.
Making quick changes to how you frame the image is something that's easy to achieve with a zoom lens without having to move around a lot.
It came attached to a OM40 body that appears to be fully functional and both came in their original packaging with the OM40 having instructions and foam too.