First off - I put this together. Wish I could say it is original equipment. The British military stoves are so hard to find here in the America. That being said - I purchased two No. 7 stove cases from Canmec, they are dated '78. I already had a Primus 71. When the cases arrived and I tried the Primus, I felt that the burner sat to high because of the tall tank. So I recently found another Primus 71 parts stove that had the small tank. I already had a donor Svea 123 burner. Works great ! Now if I can just get my hands on a British Mk II or No 12 without breaking the bank.