13.5 Lb. Tin of Survival Biscuits

Just got this on the weekend.  It is C /l\  marked and is unopened. I am guessing lifeboat or aircraft ??  It is 14in X 10 X 10 & 13.5 lbs.
Have any of you guys seen before or have any other info on it.  

                                                                                                                         Thanks Jim

Neat! I like the old rations, and actually opened and taste tested a 1945 ration a while back. Gross, but interesting. Biscuits don't seem to last and are usually rancid.

Interesting tin although I would be concerned that the 'C Broad Arrow' has been added to enhance the sale of this item. Have a look other images of wartime rations and you will see that this tin does not conform to what was used at the time.

I echo what Ed says.