Hi Gunner
I will ask the parent company if they can tell age by what you have provided. My experience has been these types of transducers almost never go bad regardless of age unless they get hit by something and physically damaged or water is allowed to cover it and water wicks down into the unit/cable and kills the elements. Unlike others these units last at least 25+ years. You can always sweep the transducer to see its response curve. If you have a tester of almost any type, our support guys have baselines established you can compare to.