4.7 inch Naval case

[SG500]

I picked this up yesterday, not my usual sort of thing but I don't recall having seen one in the time I've been collecting.
Its a naval 4.7 inch case mk 9 and 12 with 4 sets of cut outs at the top. Case length is 775mm and rim diameter 155mm
If anyone has a complete one or projectile I'd be interested in seeing photos/info.
Thanks.
Dave.

 

[2pounder]

I have a Mk IX case of 1934 that is 775mm long and has one set of cut outs but no crimp groove in it. Pretty certain it is unfired.

 

[HAZORD]

Nice case!

 

[SHAKY]

May I ask the purpose of the cut outs ? I have seen them before but never new what they are for.
SHAKY

 

[Darkman]

The cut outs are to form tabs to fold over to retain the wad (I don't know the correct terminology) in the end of the case. The 4.7 was a separate loading round.
This case appears to have had another set of tabs made by additional drilling, indicating it has been reloaded at least once, as does the extra F.

I bought a 4.7 inch Mark 5 case (naval and coastal guns) about 2 weeks ago. It was 1918 dated and made by EOC. Not really my thing so I sold it to my mate Ron.