First the 2 Fritz Zimmermann cores , the most common as in the one you posted and the less common thin date core type . The common core is a S&L core , which also indicates that Fritz Zimmermann obtained this from S&L . The thin core could be their own or from another source - anyones guess .
I do not have the regular FZ EK2 - just the thin date and one you had at one time . Note the strange balls in the thin date on the right one - are like small paint dots .
The thin date version's reverse date may match up with the reverse date of the original cross I posted above. I'll search the archives for a sample of the thin date version's reverse date to post here...unless you already have one to post...?
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