AVA MATIC SHELTER V1-23X ( 1954-1969)AVAMATIC SHELTER V2-23X ( 1969-1975)AVA MATIC SHELTER MCVX ( 1970-1984)AVA MATIC SHEPARD STAR 3 SYSTEM ( 1978 – 1989)AVA MATIC INDUSTRIAL PLX-200 ( 1980-1998)OTHER VERSION