What some people have hinted at but not said bluntly is that the metered finder is the weak point in the F system. The unmetered eyelevel finder like the one you've got is the one everyone wants, and you'll find they're expensive to buy. You can get a non-working Photomic finder for a fraction of the cost. A working metered one or a nice looking non-meterd version will set you back over $100.
The metered finder works around a "ring resistor" system that wears out over time and with heavy use and is expensive to repair. I had an F that I bought new and owned for 15 years. At the end, the meter had failed and I had solved the problem by metering off-camera.