Thanks Fred. I'm going to put up a Blue Glass and Silver Salt Pepper and Mustard Set later today and if you would like to give me any insight on that I would really appreciate it. It's by Webster of North Attleboro, but they have wide open dates - I presume it's also from the early to mid-20th though.
I believe the set would be considered as two pepper shakers and a salt cellar. It is possible that they created the shakers for salt. The cobalt liner keeps the silver from damage caused by the choride in the salt.