Lear Siegler ADM-1A
The Lear Siegler ADM-1A terminal is an upgraded version of the ADM-1 terminal. It was introduced in July, 1976 and priced at $1,850.
BitSavers
References
"Lear Siegler Upgrades ADM-1, Gives ADM-3 Full Cursor Ability", Computerworld, July 5, 1976, pg. 17