Cognac Roullet & Delamain Grande Champagne 1858

One of our readers has a great vintage bottle: A Roullet & Delamain Grande Champagne 1858. He sent us his photos and the needed information. Our reader would like to learn more about the bottle.

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I have a bottle of Roullet & Delamain Grande Champagne 1858.  The label is in excellent condition except for a small tear on the right side.  The fill is low shoulder.  The bottle has been stored in two 55 degree wine cellars in Phoenix since the 1950s.  It has been in my personal cellar since.

Roullet & Delamain Grande Champagne

I am planning to sell the bottle and would appreciate your suggestions as to my best options.
Counsel will be much appreciated.  Thank you.

As always: Comments are welcome.