nlucak; Let’s see if we an help you find out what range you have. First get out a tape measure and measure the width of the range. It will be either a 60 inch or 72 inch depending on the griddle width. Is it black or stainless steel?  Your spec plate will be seen by taking a flash light, getting on the floor, and looking at the frame under the left oven door above the safety valve.  Does it have a hydraulic safety valves? Or millivolt with a thermocouple?
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Up to last spring it was easy to research old ITW equipment all the way back to the thirties. But today a lot has been dropped off. However, the “D” handle knob, dials, and handles are common because the same style valve is used on all gas equipment burners for many many years. Many of us always carried spare on our trucks cause everybody looses them or breaks the cheap plastic ones with pans and carts. Now temp control dials are a different story.