Vintage Pair of Aircraft Radio Corp Style Spinner Knobs

Here up for auction is a pair of Aircraft Radio Corp spinner style knobs. Knobs are MISSING the set screws for attachment. I took a photo with a tape measure to show roughly the measurement. Knobs accept a small round 3/16" shaft. These knobs are used/vintage and have some surface scratching and paint chipping. Not in the greatest shape but are hard to find. See photos for condition. The knobs you see in the photos are the exact knobs you will receive. Please feel free to ask questions or for more photos. I do combine shipping and only ship within the United States at this time.