Model 915 Bird Adaptor includes a tooth bar with curved beak bar.

 

Dorsal/Ventral adjustment dial – Calibrated in 100 micron increments, 1 mm per revolution.
Dorsal/Ventral adjustment – 30 mm
Dorsal – 10 mm above ear bar zero
Ventral – 20 mm below ear bar zero
Adaptor Plate A/P adjustment – 44 mm
Ear Bars – Model 955 Non-Rupture 45° Tip Ear Bars (6.3 mm square with 35 mm of calibration).