Years & models for steering plates?

Can anyone tell me the approximate years and models of Murrays these steering plates (or whatever they are called)? They came off of Murrays I parted out in the late 90s. I think the black one was from a Sears made by Murray. I got it from a customer I mowed for. He had just replaced the steering plate on it before I got it. He didn't tell me only a few of the 5 gears worked so I parted it out. The gear on the shaft of the black one is like new. The gear on the shaft of the red one is worn. I am at least going to list the black one on ebay but I'm not sure if it is worth it to list the red one.