The A106 was the bottom of the line (BOL) machine. To differentiate it from the rest of the line, they painted the grey area, rather than chroming the panel. Cheaper to produce, and they pass along those savings to the customer.
In fact, when these debuted in 1966, the A806 and the A906 were the ONLY washers to have chrome on the panel edges. The A106, A206, A406, and A606 were painted. It wasn't until a few years later that Maytag started chroming panels other than the TOL models.
Ben