[codefox1]

Well colored wires changed a lot over the years. AC lines were grey (or black and white on later sets that were somerthat polarized, Thick green was always 6.3m and the center tap was green/mostly with white or black. The classical filament winding was yellow, and not always center tapped, Secondaries were almost lways were red, and the center tap could be just about anything. but it should be easy to find out with an ohm-meter.

Many times the colors are so faded and distorted that it is not easy to see what is going on, so a little cold (off line) tracing is in order just to see what is going on.

Finally if the wires coming out of the transformer are frayed and worn, there is nothing to prevent you from opening the bells, carefully replacing leads with proper insulation, or using heat shrink tubing, etc.. and launching the device into the next century of use.

In the end, you decide.