The piece is in excellent condition. I believe the monogram is nst but not certain. The inside of the case has a few stains. There is a line on the inside if the case but it does not go all the way through so it is not a crack. The dimensions of the case are 2 3/4" wide x 1 3/8" high.Please visit my store, age well antiques, and look at the other celluloid items that i have listed. This item is made of celluloid.