Espee

Nickname for the Southern Pacific Railroad, or “SP”.

I really like those Espee diesel paint schemes.

Shay

The Shay locomotive is a geared steam locomotive that originated and was primarily used in North America. The locomotives were built to the patents of Ephraim Shay, who has been credited with the popularization of the concept of a geared steam locomotive. They were commonly used for logging/timber work, but now spend their days on tourist lines across the world.

P1: "Have you seen those Shays up at Cass?"
P2: "Sure have, they're huge in person too."