This is an all original and good condition lot of 20 vintage green glass marbles with various styles and swirled color stripes that are typical of the Christensen + Akro Agate co-not an expert on how to tell the difference and could be by other makers... in nice shape with no excessive wear or damages--no nicks or chips and are 1/2" size... .looks and displays well and are guaranteed original and authentic ....check listing for other early glass marbles from an upstate NY estate.....Shipping is via USPS in US and overseas…...always glad to combine on multiple buys when possible