Here's a picture of a bottle I once owned. I'm putting it here so I can link to it to show a friend. The bottle was made in 1855 by two guys who partnered for that year only. The color is really rare. In olive green, it is actually quite common. It also comes in sky blue and cobalt blue. The blue versions are worth about a sixth of the black version. I don't know what it is worth today exactly as there are only about 6 or 7 examples known. This bottle sold about 15 years ago for $6000 by me on Ebay and then again for $12,000 by the person who bought it from me to a collector. I would estimate the value today at $20k to $25k.