Hi, here are some photos of an Optimus 8R made around 1957/8 I believe; The features that make me believe that this is one of the early Op.8R stoves, produced around 1957/8, are as follows: 1. Fully embossed case. 2. Self-adhesive Optimus Globe logo. 3. Slot-type SRV on filler cap. 4. "Cookie Cutter" pattern knob on regulator spindle. 5. Fitted burner support bracket on back wall of case. This stove has had an interesting life. I bought it about two years ago from a man who had been a volunteer in a Scottish Mountain Rescue team, and also involved in Youth Adventure training. I aquired this stove and an Optimus 111 which he said regularly accompanied him in these activities. I cleaned up and refurbished these stoves but did no restoration on the cases, apart from giving them a coating of wax polish. Best Regards, Kerophile.