Dollar Uncirculated

Why is there wire in my clear, uncirculated roll of washington dollars?
I received a few rolls of presidential dollar coins, for a gift, a while back. I was looking at one and it appears to have a wire inside the case, with the dollar coins. The case is sealed shut with a world reserve sticker on it. What is it? It is a roll of twelve George Washington coins.
I would think that it would indicate that the roll is “uncirculated”. If the wire had been disturbed, it would be “circulated”.
1878 Uncirculated Tail-Feather Morgan Silver Dollars – S…
April 20th, 2009 in
Uncategorized | tags: 1885 silver dollar uncirculated, 1922 peace dollar uncirculated, 1923 peace dollar uncirculated, 1971 eisenhower dollar uncirculated, 2000-p sacagawea dollar uncirculated, coins, _2008_kennedy_half_dollar, _commemorative_mint_dollars, _us_mint_presidental_dollars, _washington_monetary_authority