In the 1950's I worked at the Arctic Research Lab. in Point Barrow, Alaska.  We were fed in the contractor's mess, where a baker rumored to have been Adolph Hitler's chef at Berctesgaden produced, among other things, small, hard, crusty rolls that were remotely similar to Kaiser rolls.  I wasn't a baker at the time.  I suspect the ingredients were flour, yeast, salt, and water.   I've since tried many recipes that sounded right, but the products are not the same.  They were called pilot rolls or pilot biscuits at the time, but are very different from the pilot biscuits of WWI and earlier times.  The closest in my experience were in a restaurant in Guadalajara, Mexico.  Any hints?

Ed Clebsch