Precision Airlines- September, 1985

Precision Airlines was a carrier specializing in the New York and New England area. The airport map in the timetable shows affiliations with both Eastern at Newark and Boston, which began in 1982. Precision would repaint its planes in the Eastern Express livery in 1986. TWA is also featured at Laguardia.

From 1989:

Precision Airlines, its flights interrupted by the Eastern Airlines strike, plans to resume New England commuter service as a Northwest Airlines affiliate, a radio station in Concord, N.H., reported Thursday.

Precision, which had flights to Albany until its shutdown, said it has signed no agreements and will not comment on any negotiations it is conducting. 

Precision, an independent carrier that flew as Eastern Express, said Wednesday a U.S. bankruptcy judge in the Eastern Airlines proceedings approved an agreement between Precision and Eastern to end their affiliation.

Their route maps as an Eastern Express carrier can be found by clicking "Precision" on the label at the bottom of this post.  At one point, they were also a commuter carrier for Northwest after Eastern's bankruptcy. Precision ceased to exist in June, 1994 and was absorbed by Business Express.