An opisometer, also called a curvimeter, meilograph, or map measurer, is an instrument for measuring the lengths of arbitrary curved lines. The instrument is most commonly used to measure the lengths of roads, rivers and other line features on maps. Opisometers designed for this purpose provide scales reading the measured distance in kilometers and miles. A simple opisometer measures .consists of a toothed wheel of known circumference on a dial face. The wheel is placed in contact with the curved line to be measured and run along its length. By counting the number of teeth passing a mark on the handle while this is done, the length of the line can be ascertained: line length = wheel circumference × teeth counted/teeth on wheel.
This particular one is for nautical miles and has 7 different scales on one side is marked 1:5000, 1: 10,000 , and 1:15,000. On the other side it;s marked : 1: 20,000, 1:40,000, 1: 80,000, and 1: 100,000. It is in good condition. It Marked GERMANY It comes with textured leather case. The leather case is in good condition.
Items will be shipped via USPS economy delivery and uninsured, unless buyer makes request otherwise. Tracking information will be provided.
Item is shipped within 72 hours of payment (unless purchase is made on a weekend/ holiday, then it may be up to an additional 48 hrs)
Payment types accepted include: Paypal (Visa, Mastercard, Discover, & American Express), & Money Orders Please submit payment within 24 hours of order. Item will be shipped no more than 48 hours after payment. *Usually shipped within 72 hours after payment, but in cases of weekend/ holiday orders, it may be up to an additional 48 hours.
Returns & exchanges
Returns and refunds (minus shipping cost) will be accepted only if item received is significantly different than the description. Returns should be initiated within 7 days of receipt of the item (as per Delivery Confirmation). Buyer is responsible for return shipping costs.
Each item categorized as vintage has been researched to the best of my ability in order to determine manufacture date, rarity, and to price fairly. In some cases the date may not be exact. If at any time, anyone viewing my posting sees any details that should be corrected please contact me. Thank you.
Also please keep in mind: Vintage items may show some wear due to the age. I will do my best to accurately describe any flaws. Some items that are obviously rustic in appearance, I will not bother to point out such flaws. If it's an item that is electronic or mechanical in nature, I will always tell you if it does or doesn't work properly.