Help with markings on a 18PR shell casing - Other Equipment - The

Hi. I was wondering if someone could tell me what all the markings on this casing mean - i do not have any military knowledge but am guessing this is from a British 18 pounder cannon. It looks like is may have been refilled a few times is this correct? I thought the OMG might be the company but c

british 18 pounder case paint markings - Arms and other weapons

Ww2 Shell Casing - Finland

british 18 pounder case paint markings - Arms and other weapons

WW1 Brass Artillery Shell Trench Art British QF 18-pounder 1915

british 18 pounder case paint markings - Arms and other weapons

Nomenclature Stampings – The Vickers Machine Gun

Help with markings on a 18PR shell casing - Other Equipment - The

Original British WWI Era Royal Tank Regiment Tobacco Can Shell

Can anyone identify this shell casing? (More info in comments) : r