Thanks Joe, Yeah I was thinking of the Gerbers but was not sure in and around 1972 who was the owner of Attex or if the Gerbers were involved in the company any time that the simulators were produced. Maybe Bill will see this and have some knowledge. Anything for the military should have an ID tag but if they were supplied to fire departments and such maybe they would not be tagged. In any case #2 is a very early production.