@OMC these are what I have. Also something different. The pot stands are shorter than expected. Not the height but the length of the hook that sits under the pot. Will not hold a Coleman SS camp perculator coffee maker.
@Remus1956 a few comments. there may be more to this discussion (in fettling forum ) from myself or others. I dbl chkd comparisons yours vs Travelling-Optimus No:1 - 1914/18? the 2 do seem to match Remus yours does NOT have a dimple spirit cup correct? BOTH even have earliest bottom stamping w/same anomaly: the top of the B is cut off /missing. that's peculiar year range 1914 /18? still works for me. clarifying minor details: re my: "marblecreek's Operational Old Optimus No. 1 has an earlier burner (call his 1911-c.1914?)." i add: BTW there are not 1 but 2 earlier Optimus Roarers . re my "Y'all can dbl chk the details but yours & his might exact match marblecreek's except the burner (incl. tin)?." i add: his has earlier burner and earlier filler cap. otherwise same "i think", incl. tin. ------ thought i had more.. all for now