If Moleskines are a throwback to a time before PDA’s, then 18th century version of the PDA is the pocket notebook made of sturdy brass stock with 4 old ivory pages and a pencil can be written on with pencil, smudged off with your finger, and used over and over again. It closes into a 1-1/8 inches by 4-1/2 inches by 3/16 inch thick package. It seems like an 18th century version of the Magic Slate.
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