Soyer DStoves

[The Bedford Boys]

Does anyone have the dimensions for a soyer stove?
These field cookers were used from the Crimean war through to the Falklands conflict by the Britsh forces but also in stock for civil defence.
Over the years different manufacturers have made the stove so measurements may differ slightly.

I need the outside diameter of the main drum and its height to confirm the scale I am using to make drawings from a photo.

The stoves are sometimes available in Britain but i have not seen any in New Zealand though I know we used some here but they may have been a local pattern.