The AMI H-1160 Record Support Rails are found on the mechanisms used in the following AMI models:
G200, H200, H120, H100, I200, I120, I100, J200, J120, J100, K200, K120, K100,
Continental, Lyric and Continental 2, both electric and manual select models.

Two are used per machine - this liksting is for one pair in good condition.

The mechanism model numbers I am aware of are:
900 (200 selections, electric select)
900-1 (120 selections, electric select)
950 (100 selections, manual select)
960 (200 selections, manual select)
985 (200 selections, electric select)
(990 (100 selections, electric select).

The mechanism part offered here is in good used condition.