^Lot 322 fire department rank insignia, specifically collar pins and hat badges representing different comma

fire department rank insignia, specifically collar pins and hat badges representing different command levels.
Two Standing (Parallel) Bugles: Represent the rank of Captain. These are often found on collar discs or as hat badges.
Two Crossed Bugles: Typically denote a Battalion Chief.
Four Crossed Bugles: Represent an Assistant Fire Chief.
Single Bugle (Scramble Design): A single horn, often surrounded by other firefighting tools like ladders or axes (a "scramble"), usually represents a Lieutenant.
Crossed Swords with Tank: This specific pin (middle left) is a US Army Armored Cavalry or Armor branch collar insignia from around the 1950s or WWII era.