Yes its similar but not blue crystal its definately clear transparent. The orrefors signature part of my pic looks blue because my cameras a bit naff and i had to use a loupe which has blue white led lights and hold it over the lens to magnify it (no mean feat). The base has alot of scratches so i wonder whether it did have an id number and letter which wore off over time. I was about an hour looking through the loupe 60x at miniscule scratches for possible codes after a while it was like seeing shapes in the clouds, so i just gave up on my imagined false leads and posted it here.