Old GE Fridge Wattage
Even if someone had the specifications (and that supposes that you had the model number), those specifications would be for the new-out-of-the-box performance, not after four decades of service.

And given that the equipment is at least a decade older than Energy Star and more than two before it was expanded to general home appliances, the odds of those specifications containing meaningful real-world energy utilization information, is pretty close to zero.