Output Transformer Identification

[mokomon]

I was wondering if anyone can identify an output transformer for me .The numbers on it are:
83-313-000
606143

[Bruce / Mission Amps]

I was wondering if anyone can identify an output transformer for me .The numbers on it are:
83-313-000
606143

606 looks like Schumacher or Woodward-Shumacher
Could be 1961, 1971 any maybe even 1981.... the other numbers look like model # and or
who the transformer was made for.