the.com/pocket watch

means A small portable timepiece carried in a pocket, usually on a chain, rather than worn strapped to the wrist.

from Portable clocks appeared in the 1500s once spring-driven mechanisms replaced weights, letting clockmakers shrink the whole mechanism small enough to carry. Early versions were worn on a cord or pinned to clothing before pockets became standard menswear, at which point the watch simply moved to fit the new storage spot — the word 'pocket' is just the plain English noun, no hidden trick there. Wristwatches didn't take over until the 1900s, pushed along by soldiers who found fumbling for a pocket watch in the trenches wildly impractical.