Firefly Planisphere Deluxe by Storm Dunlop and Wil Tirion at 15″ in diameter had print too small to read without magnification. Here is a 36″ version. The star chart is to sixth magnitude from the back of the original.
PK Hoover – Sky and Telescope, 1962 – adsabs.harvard.edu
Title: A Giant Planisphere in Color. Authors: Hoover, Paul K. Publication: Sky and
Telescope, volume 23, page 203. Publication Date: 04/1962. Origin: S&T
Hoover’s Planisphere was 24″ but he made it from scratch.
85 degrees North. 6000 x 6000 model of 100 meter data produced by the LOLA Science Team. 6 10 inch by 15 inch tiles produced on a rapid prototyper and assembled. 16-ounce carpenter’s hammer for scale. The model is now in the hands of the Lunar and Planetary Institute.