A key holder located at the visible base of levers in a frame of NSWGR in the 20th century.
In a primary mechanical lever frame located in a signal box, such holders held 2 identical Annett keys for unlocking particular secondary frames around the yard. A key could only be released from a holder by pulling its lever off normal, thereby engaging some safeworking interlocking that prevented some other levers in the primary frame from being altered. The lever from the holder of which 1 or 2 keys was removed could not be restored to normal until both keys were returned.
Intended for use as a discretionary mesh to appear on selected levers of the assets:
<kuid2:368725:90030:4> NSWGR mechanical lever frame for a signal box, 18-28 levers, for avatar operation
<kuid:368725:90053:1> NSWGR mechanical lever frame for a signal box, 8-18 levers, for avatar operation