United States
Scott USA 65-E11
Two Recorded
Rare Grill Patent Essays
Washington vignettes produced by the NBNC for the contract of 1861
Loewenberg Essays
Unique Essays
An annotated census of rare grill patent essays
Loewenberg rarities. Essays produced by the NBNC to prevent reuse
Scott USA 79-E14/15
'First design' essays for the 3c. Two types: primary and secondary
‚ÄčScott USA 74TC
Various unique essays produced in the 1860-70 period.
3c Scarlet Trial Colors. Cancelled in New York or signed by MacDonough.
Scott USA 65-E11
Various essays from the 1860-70 period of which there are only two.