Stunning Victorian marbles which were blown by manual labor are set to be sold at an auction by Great Western Auction House in Glasgow, Scotland, and bids could reach thousands of pounds. /VCG Photo

These 200-year-old "onion skin" marbles with a wooden solitaire board are believed to have been made in Germany in the late eighteenth century. /VCG Photo

The two sets, estimated to fetch more than 1,000 pounds, were coincidentally handed into Great Western Auction House by two separate vendors last week. /VCG Photo

David Convery, saleroom manager at Great Western Auctions, said he hadn't seen marble sets of such "quality and rarity" before. /VCG Photo