Sorry to say it, again, but your W. Richards is a Belgian gun that was marketed simply to play on the name of Richards. It’s not a high dollar English collectible. If you look under the barrels, you’ll find an E/LG proof mark, a small tower (looks like a small hammer), and a curly-q "EL" overlapping each other.
Depending on condition, you could figure on $250-450 or so.
If you want to post pics of the proof marks, we can probably tell you the age etc.
Yours is about the fifth or sixth Belgian gun that’s been posted here in the past week or so.