The regular dies trial piece struck in nickel. These were either deliberately struck for sale to collectors or are mint errors struck on 3 cent nickel planchets. We can account for the following examples: To see all available images, click here. 1) Parmelee-NY Coin & Stamp 6/1890, Reed-Durham Museum – ICG62 2) Heritage 8/99 ANA as PCGS66, Simpson-Heritage 11/20 – PCGS67 3) Stacks 8/76 ANA, Fairfield-B/R 10/77, Byers-Heritage 4/15 as NGC66, StacksBowers 5/16 – PCGS66, illustrated above, click on the thumbnail image to enlarge 4) Merkin 3/68 5) MTB in 1974, T.R. Walsh, per Pollock, possibly the same as #2 or #4 The Mike Byers coin has been authenticated and certified by NGC as a MINT ERROR. It was struck on a 3 Cent Nickel planchet and graded Mint State 66 as shown below. It is unclear, at this time, what the true status of these pieces really is. Photos courtesy of Mike Byers.