Three variants of the workshop label are known today.
京新 - Hsinking/Changchun https://en.wikipedia.org/wiki/Changchun
中谷時計店 - Nakatani Watch Shop
奉天 - Fengtian/Mukden https://en.wikipedia.org/wiki/Shenyang
Workshop mark.
中谷謹製 - Qualitatively Made by Nakatani.
Mark variation...