Produced under contract by American Button Company, the ABC razors are certainly among the most ornate of Gillette's offerings. Well made and well plated, they clean up very well and are quite exciting to find in the wild!
ABC Pocket edition caps are smooth. Yours looks just fine. If anything, you see monogram engravings on the cases from time to time. I'm a big fan of the basket-weave case, myself. Your set looks lovely. Give it a gentle cleaning and use it. It's a great old-type open-comb shaving experience.
-- Chet