1873 Pleasant Valley Wine Co bottle

[RC Customs]

I have a bottle of Pleasant Valley "Great Western" Extra Dry Champagne. Well this is all that i can get from the bottle. I would like to know that value of it if anyone knows. It is unopened and in decent condition. I can send pics to someone who knows about or would like to see the bottle to make sure my info is correct. I am not by any means a wine collector, and i don't know much about vintage wines. Thanks for your help.