This is a Montgomery Ward gas range made by Tappan. Parts are no longer offered for this appliance. So, I had to eyeball various ignitors to determine which one would work. I settled on the least expensive one and ordered two (Just in case there were "issues"). The parts arrived quickly but were not a simple drop-in replacement. The new ones were longer and smaller in diameter. I had to use the original bracket because it provided the electrical ground for the spark. I used a spring to retain the new ignitor in this bracket and adjusted the spring (like a screw) to hold the new ignitor in the best available position. I also had to cut the wire from the old ignitor and install a spade quick disconnect for the new one.
Having done all that, I then had to monkey around with that bracket until I had the right spark gap (like a spark plug on a car engine) to ignite the burner. This took hours and I ended up with a very distorted bracket. I kept bending it and straightening it until the magic flame appeared. Finally, success!!! I'm now getting consistant ignitions on the right side burners.
I also cleaned the burner. It was full of oxidized material which I removed and then cleaned each orifice with numerous toothpicks. I think dental probes would have done a better job, but mine were unavailable at the time. If I had used them, or something else metallic, I would have had to be careful of distorting those little holes.
The job took much longer than I had planned, but I was able to keep an obsolete (almost forty years old) gas range running. Just to be on the safe side, I'm starting to save up for a new range, in case this one gives up the ghost.