All About Pocket Knives

This knife is at a local auction just wondering if anyone could give me any information. Description says William Rogers Sheffield England trade knife Any info would be helpful , is it correct , what to look for , maybe a ballpark value. The Rogers is the one on the left bone handles the one in the middle is also suppose to be a trade knife and the one on the right is suppose to be a ww 2 fighting knife. The pic is not the best. Thanks in advance

Hard to tell from the picture but it looks like the Rogers has been heavily sharpened and lost a little bit of blade length. Are both handles intact? Not sure of the age;they are kind of hard to date. The one in the center may or may not be old.If it is old it could be 1920's era or slightly before. The knife on the right looks to be home made.Kind of a weird shape but the grind on the blade looks pretty good.Price is really subjective;depends on how bad someone wants them.

thanks knife knut wouldn't have known about the length on the rogers , in the description it has indian trade knife not so sure about that