You'd want to look for things like any haze (doesn't appear to have any staining), open bubbles, high-point wear. Although you mentioned there are no chips, feel of the bottle all over, especially top, base edges, embossing, etc. for any roughness which might be small flakes/chips or open bubbles. It's amazing how little spots of damage can hide from the eyes, mine at least.No cracks or chips. Other than that, I wouldn't know much about grading a bottle.
It's smaller than the quart.
Don't have much to judge from but it looks like a half-pint.
Really nice looking flask.