Ek-1 one piece construction

[AlikN]

Is this a correct small nut on this cross or it is a replacement ?

Thank you !

[AlikN]

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[AlikN]

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[Green]

IMO there are 3 variations nuts for Schickle Screwbacks!

Nuts Otto Schickle.jpg

[swjXE]

Nice cross even with the replacement nut!

[AlikN]

IMO there are 3 variations nuts for Schickle Screwbacks!

[ATTACH]4561541[/ATTACH]

Thanks!

Looks like in one on right side possibly has nut "wrapped" in it, ...two piece construction screwback?
Also this nut is made of brass the same material as a screw and have the same silver finish.

So possibly outer part of the screwback is missing.