Information needed about David Nicholson 1843 bourbon

I have recently received 2 bottles of David Nicholson 1843, 7 years old, 100proof.
On one of the bottles the US Government sticker says Spring 1957 Fall 1964, and the other bottle says Spring 1963 Fall 1970. What exactly does that mean? Are these bottles rare?
Would they have good value at a bourbon auction?
Thank you in advance

I don't know anything about a "bourbon auction" but I can tell you that similiar bottles from the 50's and 60's sell on ebay for $25 to $40 each. A few bottles of "bonded" or "bottled in bond" whiskeys that have sold recently were Old Forester and Old Grand Dad.
I'm a big fan of bourbon and I've recently found bottles still on the shelf from the 60's and 70's. Really cool to find a taste of history and it's only $10 or $15.
If you're interested in selling them, feel free to email me at This e-mail address is being protected from spam bots, you need JavaScript enabled to view it
I'd like to add then to my collection...and then drink them.

I almost forgot...To answer your question about the dates, those are the dates the whiskey was distilled and bottled. Just a little proof that your whiskey is 7 years old.
The "Bonded" 100 proof whiskeys had to follow some gov't regulations.