It ought to be mentioned that however most Ground Pontil Transitionals are attributed to manufacture in the united states by Leighton, some have a short while ago been dug from former glassworks websites in Lauscha, Germany, suggesting that Probably the technique for making these marbles was picked up by Leighton http://gorgeous-marble-watches-f79012.blogofoto.com/12392527/marble-watches-fundamentals-explained