Here is a very clean mint hinged example of a Brunswick #6 1/2-groschen stamp, issued in 1863. This stamp is well centered, with wide margins on all four sides, although the left margin is somewhat slanted. There is a hinge remnant, but there are no other defects on the reverse.

Current catalog value of this stamp is $21.00.

I believe that this stamp is genuine, but I am not an expert. If you purchase this stamp and decide it is not genuine, or that you don't like it for any other reason, you may return it within 14 days and I will refund your purchase price, less shipping cost.

As with all of my store items, Best Offer is enabled for this item. If you wish to make a Best Offer, please send me a private message explaining why you think these stamps are worth no more than your offer. If you sound like you know what you're talking about, I'll probably accept it.