Identify markings on shell case

[TinaP]

Hello, would someone be able to tell me what these markings mean. It’s been turned into an ashtray.

thankyou

Tina

[Spaceman]

Shell case for Ordnance QF 4.5-Inch Howitzer from 1917 filled just once with Cordite (CF) and made at the Royal Laboratory at Woolwich Arsenal. This is a Mk I cartridge case (2.75" long). The Mk II was slightly longer.

[peregrinvs]

I think that’s been made from a cartridge case for a QF 3.7 inch mountain howitzer:

https://en.wikipedia.org/wiki/QF_3.7-inch_mountain_howitzer
 

A measurement of the width of the base would confirm it.

[Knotty]

4 hours ago, Spaceman said:

This is a Mk I cartridge case (2.75" long)

Width surely? Thought they were more than that.

Edited 9 August , 2023 by Knotty

[TinaP]

Thank you for the info 

[GWF1967]

4 hours ago, peregrinvs said:

I think that’s been made from a cartridge case for a QF 3.7 inch mountain howitzer:

https://en.wikipedia.org/wiki/QF_3.7-inch_mountain_howitzer
 

A measurement of the width of the base would confirm it.

Certainly looks a better fit. 

[GWF1967]

3 hours ago, Knotty said:

Width surely? Thought they were more than that.

My “slightly longer “ Mk 2 casing is 3 3/8th Inch/86mm tall. 

[Knotty]

13 minutes ago, GWF1967 said:

My “slightly longer “ Mk 2 casing is 3 3/8th Inch/86mm tall. 

Cut off?

[GWF1967]

58 minutes ago, Knotty said:

Cut off?

No, textbook I believe. Short casing, adjustable charge. 

Image. War Office UK. "Treatise on Ammunition, 10th Edition, 195" Plate. XCII. 

[Knotty]

20 minutes ago, GWF1967 said:

No, textbook I believe. Short casing, adjustable charge. 

With you now on what your referring to, was having a read up myself on the 1915 Treatise, got myself involved again 😁p 165,170,188, show total length of the cartridge I was think of at the beginning.

Every day etc….

[TinaP]

[Spaceman]

Looking at the scale drawings, the length of both the QF 3.7" Howitzer Mk I and Mk II cartridge cases look to about the same at ~3.7" +/- 0.1". I think the brass case was the same in both cases and it may only have been the design of the charge increments that was different.

Edited 10 August , 2023 by Spaceman

[Matlock1418]

7 hours ago, TinaP said:

Tina,

Welcome to GWF.

To help those who know much better than me to help you - it might help all if you could please measure and show 1) the length/height and 2) the diameter of the other/open end.

Just a thought.

M

Edited 10 August , 2023 by Matlock1418