Match-booking Brick Oven Stone Face

All my brick ovens have a face arch.  To create a sense of symmetry, I often match-book the stone.  This is done by cutting the arch stone in half, front to back, and using the two halves in opposite locations on the arch.

A recent oven finished on the entire exterior with reclaimed cobblestones (likely about 150 years old), incorporated a match-booked stone face.