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AlanTexas
·Thanks for the clarification, Al.
I spent a lot of time reading about the design of the Powermatic 80 the last two days. A number of watchmakers and other people who have examined it believe the escape wheel and pallet fork are made from a Delrin-type polymer. Delrin is used for gears in printers because it is durable, quiet, and clean compared with greasy steel gears.
I have six Powermatic watches, one of which went into production the first year the Powermatic was released. All six are accurate within five seconds per 24 hours. If I alternate the night resting position, three of them stay accurate within two or three seconds per WEEK.
I just ordered my first ever watch with a ETA 2824-2 movement, the grandfather of the Powermatic. It will be interesting to see it compares with a modern movement.