Vintage Tube Radio Knobs Plastic 2pc 1940s-50s 1/4" Splined Shaft from a parts bin. Measure 1 1/4" wide and 7/8" high.  They are somewhat  clean, may have minor scratches, hairline cracks, rubs, dirt, dings, but overall in nice condition. I have hundreds of knobs to sell so keep an eye out for something you might need. Sold as-is for parts or repair. PB-55