Lot 376 Newfoundland 1923 15c Vickers-Vimy Essays in Blocks of Four , with two ungummed and perforated blocks, the first in brown and blue on white paper, and the second in brown and black on yellow brown paper, fine-very fine. Listed by Walsh as TE2a and TE3 and priced at $1. 120, noting that it is believed that a sheet of 100 was made for each of the above essays. Rarely seen in blocks. Includes two later imitation singles of possible US origin. Estimate C$200 .