Pre War Crane Leaky Faucets

[jellyghost]

I am working with a friend that has pre war Crane faucets (Crane-FB1077 is the stem). Her home has three of them, and they all have some problems. I have replaced a few washers, and one of the valve stems was successfully unfrozen with pb blaster (another one wasn't unfroze, suggestions welcome). On one stem, a washer was replaced, and the faucet still has a pretty fast leak. I think the seat needs to be fixed. I found an old post that said to use the right tool or the faucet will be ruined. It also mentioned that some Crane faucets may not have a seat. Is the right tool an appropriate allen wrench, or do I need to order a pool? How do I find the correct seat to replace my current one?
Thanks!

 

[Reach4]

Is your friend keeping the old faucets for reasons other than economy such as aesthetics?

A photo is often useful to let people maybe recognize the faucets.

 

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[Marlinman]

You will need a 7/16 allen wrench to remove the seat. Seat size is 11/16-22