How long should a Cal. 601 run on a full wind? What is typical winding resistance?

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OK...I realized that my magical 58 hour reserve happened because I absentmindedly wound the watch a couple times...

It is actually doing 45-47 hours per full wind, and loses about one minute over that time -

Is that accuracy decent? Based on this performance would a service be indicated?

Not enough information to say if a service is required, but it's certainly not keeping time well...