Goofs

In Season 1, the stove is just to the left of the kitchen counter, no dumb waiter in the apartment. Starting in season 2 episode 1 and through the last episode of season 5 (right before they move to California), there is a dumb waiter between the stove and the counter. Through the last episode of season 5, they continue to use the scene of Laverne and Shirley running out of the apartment from season 1, with the stove next to the counter and no dumb waiter.

In the final three seasons, when Laverne and Shirley move to California, the exterior apartment house shots do not match the set's floor plan- specifically the bedroom and kitchen. The outside shows the bedroom is above the living room, but inside it is in the direction of stage right. The kitchen extends beyond the living room, stage left, and from the outside it just shows that the building ends at the living room.

When the series "relocated" from Milwaukee to Los Angeles during its last season, the views of Los Angeles shown in the opening credits where clearly from a post-1970 Los Angeles.

In the later seasons, Shirley's hairdos resembled those common in the 1970s/1980s rather than those of the late 1950s/1960s.

In the opening credits for the show, I spotted an Interstate Highway sign. The Interstate began construction in the mid-1950's, and Milwaukee wasn't added to the system until quite a bit later.

The show was originally set in Milwaukee, famed for its brewing history. The title characters were bottlecappers in the fictional Schotz Brewery, so they are shown working along a brewery's bottling line during the opening titles. However, this sequence was obviously shot in an Anheuser-Busch facility, as the bottles shown streaming along the conveyor are the iconic 'teardrop' bottles used for Michelob beer in the 1970s. Anheuser-Busch, the St. Louis-based maker of Budweiser, never had a facility in Milwaukee.