From Lettera 1 by Armin Haab and Alex Stocker, published by Arthur Niggli (1954, 5th Ed. 1963) The Lettera books (4 volumes in all) are compilations of typefaces and lettering examples from a broad range of sources. This Didot is credited to the Deberny & Peignot foundry. The book does not mention the size, weight and other details of the cut. Letters that clearly distinguish this Didot from others are the P, Q, and W. Digital fonts that appear to be revivals include Didona, HiH Firmin Didot…