Small Bergmann?

I have some of this little cartridge, the measures are:
Bullet Ø 5,7 mm
Case lenght 15 mm
Rim 8,8 mm
Rim thickness 1,2 mm
Neck is some 4,6 mm.
Ø of primer is 4 mm
May this be some early Bergmann? I do not see it in the CoW 16.
Very excited to find out what this may be!

This should be a (.22?) Morris aiming tube.

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.297/.230 Morris Short.
1880s subcaliber tube for .450/577 Martini Henri; also available for Revolvers, Cadet Martini (with dedicated Barrel,) Volunteer MLE, Etc.
Cartridges made in England, Belgium, and others. Original load
BP.
Doc AV

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Thank you Doc Astrid! Truly impressed! Somehow it figures well, from the same source I got a fair amount of the ‘big brother’, enclosed. The .230 Morris Short I have never heard of.