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There are 4 bulbs to illuminate the instrument cluster, one on each side of the speedometer and one on each side of the clock
Another 2 bulbs on each side of the speedometer dial for oil and generator lights plus 2 more on top of the cluster in the centre, one for high beam and one for signal light indicator

If it helps, I have a really nice 1951 cluster out of the car and can photograph it when I’m next at my shop in a couple weeks. It’s from a senior model so may have slight differences (possibly left and right turn indicators) but overall it’s the same.

Here is what you want. And here is the bulb that you have to change to get it. There are 4 general illumination bulbs, plus one turn signal, one high beam, one oil pressure, and one charge bulb.

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Ross, great pics and thanks. Your clusters look exactly like mine. I think I mentioned before that the front view on mine has two illumination bulbs for the clock cluster, one for the speedometer cluster and one for the fuel/temp/battery cluster. Total of four. I have the bulbs that light up for high beam, battery, temp and turn signal working. Looking at my clusters I had assumed that the speedometer and the fuel/temp/battery would have two illumination bulbs each instead of one. It appears not. So based on what I mention above all of mine are working properly right? Again thanks David

If switching to LED, be sure to use bulbs of the appropriate colors to match the lenses. For example, if red lenses, use red bulbs or if green, use green as otherwise LEDs will be too bright and will overpower the little plastic lenses in the cluster. Also, LEDs are very directional so try to pick those with light all around.

Don Thanks for the info