They are fully leather lined. The numbers on the side (if there were any) are gone now. The size is stamped on the sole. They are a Boutique model, made for some long gone mens' store. I was able to date them by the style of the shoe (I have a general idea how to do so, but know some real vintage shoe "connoisseurs" that can do a better job than I). Actually, dating was confirmed by the gentleman who bought them new in 1964 for his Honeymoon. Wore them for a week, then never again.