Assume you are referring to the 'vermicular' decoration on what appears to be a reddish/brown background glass. Regret not my area remotely, but have just googled vermicular and Moser, and yes, it seems they did use this effect as a decorative feature. However, whether the factory used it to the extent that they are known specifically for this feature, I'm not qualified to say - perhaps one of our Continental contributors might know.
I believe that the vermicular effect was used by a variety of factories, not uncommonly in the latter part of the C19. Sorry this is not very helpful.
