Mister Rogers' Neighborhood (1968)

S3E1 The NOM Models Pt 1 - Models of the homes in the Neighborhood of Make-Believe

In episode 1066, Mister Rogers makes his entrance with a box marked 'clock.' He showcases a replica of Daniel's clock and heads over to meet its creator, Robert Trow. At Trow’s workshop, he is putting the finishing touches on a model of the Castle. Trow requests that Rogers ring the bell both when he arrives and departs, adding a playful touch to their collaboration.