76/40 naval (?) case

[charley777]

Greetings to all
Can anyone shed.more light on this Italian cartridge case ?
Ansaldo naval gun ? Projectiles used ? Era ?
Thanks very much.
It is 76x441R x 103.75 and pictured with a 12Pr 12cwt case for comparison.
The bases are very similar with a bit of a curve from rim to sidewall.
And the rims are both 103.75 mm across
The slightly necked Italian case has a continuous shallow crimp that suggests seperate loading operation. True ?
At 12o'clock SMI (Società Metallurgica Italiana)
At 3o'clock L . 5
At 6o'clock 4 73 3
Utan Firenze
At 9o'clock 1 - 1939

 

[fert]

Hello,
italian 76/40 gun was developed from Armstrong 12Pr 12cwt. Shell was crimped to case by the cannelure you note for this case is longer than british.
regards