elevating screw knob

rear-sight elevating screw knob

rear-sight elevating knob

sight elevating knob

elevating knob

windage screw knob

rear-sight windage screw knob

elevating handwheel (elevating hand-wheel )

elevating screw joint pin nut

elevating screw mechanism

elevating screw tube

lower elevating screw

screw elevating mechanism

elevating screw

control knob

locking knob

range setting knob

rear sight elevation knob

tuning control knob

focus knob

azimuth adjusting knob

azimuth adjusting worm knob

azimuth knob

azimuth orienting knob

azimuth setting knob

control signal knob

knob of firing pin

windage knob

elevating mechanism / system

elevating and depressing lever

elevating and firing craddle

elevating and traversing mechanism

elevating arm