As the frame mainly and core are Godet ... your EK1 is a Godet . They shared parts and pin sets or got parts from Zimmermann . ... and the common shared pin set between both of them . The pin set on mine I assotiate as a Godet design which has this thin pin and a slightly different anchor .
Picture of anchor :
I think that you'll find similar different features on all arms of Zimmermann and Godet crosses. (At least, I have on all of the examples I've examined, which is maybe a dozen or so.)
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