Your parts do not look like the Zeus 2000 line. The crank would be drilled and possibly milled on the arm. The rear derailleur is criterium.
The shifters are not either. These parts look older. The pedals if they where 2000 line would have titanium spindles the bottom bracket would be also and the axles for the hubs to. All the holes on the 2000 line are also counter sunk.
But hey super nice bike wish i had one like it good score