WMF Vase Holder Missing Glass

I have a vase holder marked in a square box WMF with lower case letter 'g' - Not an expert on WMF but love to know more. It is missing its glass liner and I have emailed a company that can make them so I will see whether its worth getting a new liner or not. It measures around 12 inches and its not in fantastic shape as it is discoloured but its very solid and sturdy - I bought it as I love the shape of it and to me its very Art Noveau in style. Any information would be good.