Mister Rogers' Neighborhood - Season 3 Episode 1
The NOM Models Pt 1 - Models of the homes in the Neighborhood of Make-Believe

Title number 1066. Opens with Mister Rogers arriving with a box labeled clock. Rogers presents a model of Daniels clock and visits the man who designed it who is Robert Trow. At his workshop, Trow is finishing a model of the Castle. He asks Rogers to ring the bell when he leaves as well as when he arrives.