Dating kenmore dishwasher

I'm mystified by the serial number on this Pacemaker Speed Graphic 2x3 --as far as I can read this photo it is 40885B.

The various sources I've looked up have gaps in this range, plus no serial no ends with a letter. It has a CZJ Tessar 10.5 cm f/3.5 lens whose serial number puts it around 1938.

The corresponding letters, months, and years are below.

For example, if the serial number begins with the letters "FJ," the appliance age is March of 1952.

The guide also offers tips for noisy operation, timer problems and detergent dispensers that don't open.

The Sears Kenmore troubleshooting guide also adds tips for fixing a dishwasher that stops during its cycle, doesn't clean properly, doesn't dry, leaves spots on dishes, or takes too long to complete a cycle.

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