This stove has had an interesting life. I bought it about three years ago from a man who had been a volunteer in a Scottish Mountain Rescue team, and also involved in Youth Adventure training. I acquired this stove and an Optimus No.8R both of which he said regularly accompanied him in these activities. I cleaned up and refurbished both stoves but did no restoration on the cases, apart from giving them a coating of wax polish. They had a long working life and deserve a quiet retirement The previous owner said that he had purchased this Optimus 111 new in 1978 from a supplier in Glasgow, but remerked that it had been on the shelf for some time before he raised the funds to buy it! The features which identify this Op.111 as dating from around the mid to late 1970s are as follows: 1. Plain case with no embossing. 2. Self-adhesive Optimus label on RH lower corner of case, including model no. and fuel type. 3. Penta-head type SRV on the filler cap. 4. Red, plain pattern knob on regulator spindle. Best Regards, Kerophile.