Well I know we've all heard it before "If it seems to good to be true it usually is" not only in perfect shape but a totally unbelievable 1.5" I've never seen an authentic antique German red mica of this size. The pattern layout of the mica alone points me towards contemporary. There are getting to be some "very" good contemporary artist imitating old ways of making marbles, some honest & unfortunately some unsavory. This isn't a German antique handmade IMO If you have pix of one that even comes close to this size & condition "Please" post it. Please post your perspective on this, all comments & opinions are as always welcome and respected. Note the number of sales from this seller i.e. (1) & the lack of any other marbles or marble reflated materials, someone may be fishing ??
LINK : https://www.ebay.com/itm/394130359362?hash=item5bc4000442%3Ag%3A4KEAAOSwQWxisveI&mkevt=1&mkcid=1&mkrid=