For all of you who have been watching my auctions over the years,and purchasing my vintage marbles,I just want to say thank you for helping me identifying them,and thank you for your business.Now it's time to let the real collectable ones go,so keep an eye out.I will start by saying the same thing that I have always said,I am not a vintage marble expert.I have gotten better at grading vintage marbles,not sure if this marble is a Christensen,Akro Agate,or peltier marble,you be the judge.everyone has their own way of grading vintage marbles.I consider this marble to be in mint condition,with 1 very light scratch.it measures .70" round.please look at all pictures,and do your own due diligence,on grading this marble,before placing your bid,thank you very much.