In reply to Daniel Jeremiah McCann.

Dan, you can use the rules on your machine to determine the pitch. This video is a good explainer: https://www.youtube.com/watch?v=qwCD69jUPps. Measuring how many characters you can fit into an inch will accomplish the job too.

Seeing where your serial number fits into the grid at https://typewriterdatabase.com/remington.42.typewriter-serial-number-database#po_41 will give you a manufacture date range.