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Years ago, the NAWCC Bulletin publication did an article on the 21-jewel Timex movements. The article shows the manual wind version. The DeLong escapement with vertical pallet stones was used in this movement. This escapement shows up periodically in watches by makers like the E Howard company.
https://www.nawcc.org/wp-content/uploads/2022/12/01_23_Bulletin_Book_011-014_WEB.pdf