Aldus Manutius and Ludovico ArrighiOP. decorative T&G boards are machined with a chamfer at both sides on the outre face (the upper face on the photo you posted), That face goes outermost.
Italy?
Arranging tongue and groove boards for garden gate
- Thread starter Adam78
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Deleted member 174758
Both have typefaces named after them (Aldus by Hermann Zapf and Arrighi by Frederic Warde respectively). PageMaker DTP software was originally by software house Aldus, also named for Aldus Manutius