M OFFICERS JACK BOOTS black leather Heel Caulks. The inside of the left boot has writhing that's still legible. I believe it says Frankfurt A.I don't know enough about WWII German boots to say otherwise so please make your own determination. These boots are in extremely good condition for their age but they are getting a little stiff and could use a good oiling and polishing. These boots will display nicely and may even be wearable with a high quality leather restoration product.