optimus 123Only one stove came out of this request: the Optimus Svea 123. Maybe 123 stands for the number of handling to get it burning? And burning itSVEA 123 stoves = 4,700 BTU'd Optimus 8r, and 99 = 3,300 BTU's. My own experience with both stoves seems to easily show the power difference between them. As