Ear tag ear is tagged. Australian sheep and goats are required to have visually readable ear tags printed with a Property Identification Code (PIC). They are complemented by movement documents supplied by consignors that are used for identification and tracking. Very small ear tags are available for laboratory animals such as mice and rats. They are usually sold with a device that pierces the animal's ear and installs the tag at the same time. Lab animals can also be identified by other methods such as ear punching or marking (also used for livestock; see below), implanted RFID tags (mice are too small
Viking sword complete set seems to have included two to three oval or half-oval mounts, one large strap-end, a belt buckle and a trefoil mount. Their arrangement on the sword-belt has been reconstructed by Menghin (1973). The seminal study of the topic is due to Jan Petersen ("De Norske Vikingsverd", 1919). Petersen(1919): Devised the original hilt typology of 26 types that is still widely used across Europe for classifying and dating Viking swords. Based on about 1,700 finds of Viking swords in Norway this typology remains the most commonly used. Petersen's types are identified by capital letters A–Z. Petersen listed a total