This was a bargain price, looks to have had the base replaced and a different flame plate. Maybe. All yellow pump. I believe I read that the later ones had longer pot supports. These don’t look homemade. First one I have seen. Duane
Re "Later MSR model 9?" at this moment i dunno re later. we agree it's not early /earliest one. but i did notice it has this bracket (fuel line goes thru a bracket that is riveted to the burner housing) yes? it has 9 burner body w/brkt., 4 cutouts... yes? at some point we might give examples like this a narrow year range. Smiles69 example here like yours but still has early-shorter pot supports *yours above -and- steve1000 's MSR #9 - 1974 -and- anfeng's MSR Model 9~9A (his "#2" in pic) ^^^ these 3 also longer pot supports, the 3 look to be a match or near to. do we call them late No.9 w/brkt.? i dunno (gotta run)