For sale is a Frederick Post Slide Rule Model # 1447. It comes with a case and instruction manual. It is Bamboo and has the markings Frederick Post Co. 1447 Hemi Japan. Has a little red ink around the edges…..Perhaps someone’s pocket protector failed them???! Pictures are considered part of the description.  Make sure to look at pictures carefully to make sure item meets your standards. Buyer pays shipping. Additional pictures upon request. Payment  via paypal is expected within three days of item selling.