According to the Japan Coin Dealers Cooperative Association data, these are (left) a Genroku Oban gold coin and (right) a Keicho Sasa-gaki Oban gold coin. This listing is for a set of two miniature replica reference pieces. These Oban gold coins symbolize the Edo period, but they are smaller than they appear in the photos. Please pay attention to the weight and dimensions. - Material: Both are made of brass. - Weight: Genroku Oban gold coin = approx. 8.5g, Keicho Oban gold coin = approx. 6.9g - Dimensions: Genroku Oban gold coin = approx. 5cm x approx. 3cm, Keicho Oban gold coin = approx. 5cm x approx. 3cm Please allow for some error as these are amateur measurements. This is a set of two coins. Please add them to your collection for good luck, which is very popular these days!! Thank you for looking.