Facom 55A Series Offset Box Wrench - Offset and thin-wall box end improves access to recessed fasteners. 12pt (30 degree increments). OGV profile transmits torque through the fastener flats instead of the corners to reduce wear.
Current production - open stock. Facom's 55A series wrenches are available in a variety of box and module sets.
Note - I still have a few of the 55.24x27 wrenches in stock at a deep discount. These were made in France. The 55A series is made in Taiwan.