The coins cover the entire period in which this design was issued one from each of 1887 through to 1892. 

The coins come in a plastic display case which does have a crack in it. I think it would be quite easy to replace the case.

Bought as un-circulated and high grade. I have no way of knowing whether this is accurate as I don't know anything about coins myself however visually they look in excellent condition.

Please ask if you have any questions or if you require clarification