bay cities

I wanted to start a new thread for this.  I need to find out the formula for this bread which is also a sandwich roll.  The roll has a slight sour taste to it, the crumb is soft and chewy, the crust is thin and crunchy.  The crust is the big mystery for me as it is unlike any baguette that I have made or eaten before.  This crust is much thinner than a baguette which makes it great as a sandwich roll.  Help please!