Ek1 with screwback and LDO case

[4xL]

Hello,
Is Set genuine? I am Not sure because of the Maker marking.
I just know this in another variant
Please help!
Best regards 4xL

[AUSGANG]

The date on the core looks right and the maker's mark is correct too.

[4xL]

Thanks! Is this a very rar maker?
I think so.
Regards

[CMSgt]

L/57

Nice uncommon cross but not rare. Jim

[TRAVLRSEASIA]

L/57

Yes, a good Boerger&Co. Ek1 SB. As others have said, not too rare, but also not one of the regular makers usually seen, especially in SB form