Some sellers are intentionally, or due to lack of knowledge are selling a china pattern called "Gala" as railroad dining car china.  The pattern comes in various pastel shades and has what appears to be a railroad backstamp (S.P.Co.), which could easily stand for Southern Pacific Company.  In fact the railroad sometimes used this very same mark on china used on their railroad.  If you check in Douglas W. McIntyre's excellent, "The Official Guide Railroad Dining Car China", he identifys "Gala" on page 141 as railroad dining car china used by the Southern Pacific Railroad and made by the Shenango China Company.  All well and good!

 Subsequently Mr. McIntyres publishes a supplement to his original work, wherein he states that Shenango "Gala" is not railroad dining car china and was never used by the Southern Pacific Company.  It seems that S.P. Co. actually stands for the Sebring Pottery Company and "Gala" was one of their lines.  In a phone converstion I had with Mr. McIntyre , he stated that he was misled on that particular pattern during the original publication and wanted to set the record straight.

For those of you who are still in doubt, I also did a little research myself, and using a recent dictionary of American china maker's marks, found a listing for the the Sebring Pottery Company.  They in fact used the  same S.P. Co. backstamp. 

I recently saw two pieces of this Gala china sold on Ebay for over $100 each.  A very bad deal for the buyer.