Yea, there is a lot to learn. If you want more info on the razors clearer photos of the stampings on the tangs would help. If the stampings say Sheffield and England is absent then they could be pre 1891 or there abouts. If England is included then post 1891. You could try a web search for the retailers named on the boxes who originally sold them. Can't help you much more just not an expert on that stuff.

Bob