Worm and Worm Wheel Set

Is there a manufacturer? Especially for gears, manufacturers tend to use number/letter series to represent the gear's specs.

For example, one number might represent center distance. Another might refer to mounting position. And another may refer to mounting ratio. Yet another may refer to its envelope.

You may find this guide helpful: http://www.globalspec.com/learnmore/motion_controls/power_transmission/gears/worms_worm_gears

Finally, it seems as though your two worms are matching pairs.

Had you tried to contact OEM for these gear sets? These markings are OEM specific and de-coding these numbers is not so easy.

Even if you had specified manufacturer, sombody who have used gear boxes from same manufacturer could have relied you.