The popular Washington obverse design with the "Curved" 2 cents reverse. These were apparently struck late in 1863 as per the following notation in George Eckgeldt's journal. Examples were struck as follows: Copper/Bronze J305/P370 on both thin 78 grain and thick circa 92 grain planchets. Metallurgical testing has confirmed the existence of pure copper, bronze and copper-iron alloys. This a relatively common pattern with several dozen known but surprisingly rare in full red. Copper-nickel J306/P371 with about a half dozen confirmed. To see images of all of that follow, click here. Oroide J307/P372. This may not actually exist as the Byron Reed example is now attributed as a J306/P371. Aluminum J308/P373 with the folllowing 4 confirmed. 1) Byron Reed-Durham museum 2) Kagin’s 4/75, Superior 8/04, Heritage 8/95 ANA, ANR 11/04, Heritage 8/07, B/M 8/10 as PCGS62 - PCGS63 3) Kreisberg-Schulman 4/59, Stacks 8/71 ANA, Smythe 10/2001?, Superior 2/02 - PCGS62 4) Simpson-Heritage 11/20 - PCGS63 Eckfeldt journal image courtesy of Alan Meghrig.