Dan - the chrome lint filter was used on the Washpower TOL automatics (A806 and A906) from 1966 through approx. 1972. I would need to dig around in the 'Let's talk service' bulletins to get the exact dates (this has been a goal for quite sometime, document and post all the dates for those various fun features).
Previously, the start of the lint filter was actually a gold anodized flat top filter on the 141 in 1957. This is an extremely rare beast - much more rare than the chrome job seen above. Then on the later 141 and 142 it when to a flat-top chrome filter. Starting in 1964 the fabric softener was integrated in the chrome filter, with a black cup.
Assuming that a previous dealer or owner decided they wanted to dress up their Maytag with some chrome. God bless them! This actually is a nice set and would make a family or collector happy.
Ben