Check the listing for details. Ted Cash 19th Century Range Finder Black Powder Muzzleloading. Listed at 18.99 USD. Ted Cash 19th century Range finder. Made of brass. It is copied from an illustration in the "Handbook of Rifle Shooting" originally published in1869. Instructions and storage bag included. Here are the instructions that are included. This range finder is based on an object height of six feet, and is incremented 50 to 800 yards. To find the yardage hold the range finder in one hand, place the knot at your lips or hold between your teeth, (moving the range finder outward) pull the string tight and move slide until your object touches the top and bottom of the window. Then read the yardage from the scale. Combined shipping- Please use the shopping cart if you can. Then request an invoice. If the system will not allow you to do this, I will refund overpayments on shipping. Please email me when you need combined shipping and all items are not listed on one invoice. Combined shipping discounts are only given on items when shipping charges are applied. Combined shipping discounts do not apply to items listed as “free shipping“.