I have am about to purchase 2 family house in ny brooklyn it was built ove 80 years ago it had one circuit breaker and 2 meters does this impose a problem.

You won't be able to shut down power on 1/2 of the house if needed.
Do you have 1 or 2 Electrical panels for the 2 halfs?

I have am about to purchase 2 family house in ny brooklyn it was built ove 80 years ago it had one circuit breaker and 2 meters does this impose a problem.Something here does not jive.
There is no way there is two meters and only one service disconnect.

Could it be that the other disconnect is in another location? A code violation but not unheard of.

Agree something is off here. Are the meters after the breaker panel? What wire size comes off the panel and what size breaker