This tool kit was manufactured by the Borroughs Tool & Equipment Corp. The Borroughs Corp. produced most of the special service tools for General Motors. This particular kit is the "1970 Essential Service Tools For Oldsmobile" number BT-7002. The kit includes a heated beaker (to be placed on a genuine asbestos pad!) for testing thermostats, temperature sending units and ported vacuum switches. The kit also includes a belt tension gauge (with Oldsmobile printed on it). And a radiator/cooling system and rad. cap pressure tester. Which would also serve as a tester for oil pressure sending units.
And there you have what was considered "essential" dealership tools in 1970!