Thus, there were no published lists of case company serial number vs. On the other hand, the function of the case serial numbers seems to have been for internal uses only, primarily to keep the major pieces together during production and to track the disposition of expensive materials and finished product. While movement serial numbers were used to assist in, and track, production they also needed to be maintained and published for the purposes of movement grade identification, primarily for the obtaining of correct replacement parts. ![]() Although a lot can be learned about many American watch movements by knowing the movement's serial number, the same cannot be said about case serial numbers.
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