Peterson has been producing pipes for over 150 years, so they have quite an extensive shape chart. Shapes, finishes, and sizes come and go and for a time certain models will be taken out of production. Peterson reached far back into their history for their new line of short classics. These shapes were quite popular decades ago when smaller pipes were what everyone smoked.
The Short Classic Belgique has a very slight bend to it so it is classified below as a bent pipe although most people would consider it a straight pipe.