Deciphering marks on my austrian casing

[frijoles108]

Hello all,
I am trying to decipher the marks on my austrian casing here, which appears to have restamps if i am correct? The 521 above the model of the gun that is lightly stamped i believe is a lot number? what is your opinions? Also there is two stamps of the date and also austrian markings, any ideas on why that is necessary?
Regards,
frijoles

 

[Alpini]

from the bottom up:

10cm M.14: 10 cm M.14 field howitzer
521: lot number
1916: date of case production
MW-monogram: factory of the case: Manfred Weiss in Csepel/Budapest, Hungary
CS-double eagle-16: acceptance stamp consisting of: City of Csepel (today part of Budapest), austrian state crest, year of acceptance
V-is most probably "verifiziert", something like "inspected"

 

[frijoles108]

Thank you Alpini!!