All three razors are nice, and were made by great companies.
The B.J.Eyre, Sheffield used Challenge trademark in 1867. In 1877, the Frederick Wiebush Company of New York City purchased the Eyre firm, and with it the Challenge trademark.
In 1889, Walter M.Taussing opened the
Challenge Razor Works in Bridgeport Connecticut, as a subsidiary of F.Wiebush & Company. In 1899 the name became the Challenge Cutlery Company. In April, 1926 the company was put up for sale.
Robeson! Great company.
Here some history and Robeson razors.
And in this thread you can find some history about Genco.