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I read this in the 1980's in the UK but the story was set in USA. (Think it was a hardback)
IIRC the protagonist worked at a printers in the 19th century but got on the wrong side of some "hidden city" gangsters and somehow ended up in modern times.
The hunters chased him to the year but then had to find him.
He has taken a job at his old works and is now the expert on the big old steam powered printing machine, he knew it when it was brand new.
The printing machine is now ran by a failing newspaper and their main competitor is the one who has the time chasing hoodlums working for him. He runs a sleazy tabloid press.
I think he gets asked about a brass bell that occasionally pops out the side and he informs them this is the "perfection indicator" that shows the machine is at optimum performance.
I also recall there being something about a bridge. Not sure if it was in the title or maybe only mentioned in the book cover/blurb, possibly how the time jumps happened.