Old Aircraft Jacks – Information Request

This may be a long shot, we are trying to service a number of old 4 legged 10 ton jacks, and would like to trace any documentation on them if possible.

Woulld anyone have AP`s on the following:

4 legged 10 ton jacks made by Brown Brothers, part number GM01122, AP number AP2817A.

We think they were used on the Shorts Belfast.

Any help would be gratefully recieved.