Since its not too hard putting together a set of certified War Nickels, I thought it would be a little more challenging to only purchase the nickels if they were in NGC holders and had the pedigree of Omaha Bank Hoard (OBH).
Now, I realize that there is nothing particularly rare about Omaha Bank Hoard pedigree coins, but I can contest to the fact that the 1944-P has eluded me for many years (does an OBH 1944-P even exist in an NGC slab?)!
Anyway, after years of searching, I just decided to purchase a 1944-P in MS-66 with a star designation, in order to complete the basic 11-coin set. If I find an OBH 1944-P in an NGC slab, I'll just swap it out later.
If you're curious about the Omaha Bank Hoard, Mark Borckardt of Heritage Auction Galleries says: "Heritage purchased the Omaha Bank Hoard in its entirety in 2004. The man who owned the coins is very private and doesn't want a lot of details disclosed. I can tell you that the hoard consisted of over 320,000 coins, all in rolls, that were saved by one man starting in the late 1930s and continuing until the early 1970s.
The hoard consisted of cent through half dollar rolls all in mint state condition. Heritage bought the hoard in its entirety and it required a moving van to transport everything. The earliest coins in the hoard were original rolls of Buffalo nickels and Walking Liberty halves, with most of the coins being saved in the 1950s and 1960s, and very little saved after 1964."