"Kalendarium Juliano-Romanum Perpetuum...", Halma, Francois

This is a fine copper plate engraving of a perpetual Julian/Roman calendar. The large (22") circular calendar is filled with an amazing amount of information. It is surrounded with Latin text to the neat line. Along the bottom is Halma's name plus that of Constantini Magni and the place name Principis Nassoviae. A most uncommon issue.

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Condition: B

Original color with a long centerfold separation that has been closed with archival tape, two minute worm holes only visible when held to light, and stains in top and bottom left corners. There are a few short tears in blank margins that have been closed with archival tape.