None of the wires appear to be broken, but they are definitely dry rotted where the plastic casing is coming off of the wire as seen in photos sold as is I have no way of testing this item

Brand: ALLEN ELECTRIC &EQUPIT. CO.
Accessories: Case, Clamps, User Guide
Type: Dwell and tachometer tester
Warranty: No Warranty
Display Type: Analog
Vehicle Type: Passenger Vehicle
Custom Bundle: No
Country/Region of Manufacture: United States
Modified Item: No