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Serial numbers

Description

A serial number (SN) is a unique identifier used to uniquely identify an item, and is usually assigned incrementally or sequentially.

Wikipedia. CC BY-SA 4.0. Updated Jun 29, 2026.

Broadcasts

Big Talk25:00
Dragnet 
Big Talk
Tue Mar 22 1955 · Mystery
The Big Brink25:00
Dragnet 
The Big Brink
Tue Nov 20 1956 · Mystery