Anything of the period relating to Claire Chennault's American Volunteer Group, better known as the AVG or Flying Tigers.

Anything of the period WW2 and earlier relating to the Chinese military, especially the Air Force. 

WW1 Aviation items in general. 

WW1 US wings and Aero Squadron badges. 

US & other countries WW1 Aviation badges, uniforms, flight helmets etc.

US Air Service, Air Corps, Army Air Forces Wings, DIs, patches, and Squadron Patches WW2 and earlier.

Korean War and earlier US Army, Air Force, Navy, Marine Corps, and Coast Guard Squadron and general Aviation patches.

Circa 1930-45 US Marine Corps Dog Tags in pairs only.

Old Federal Law Enforcement badges, especially from obsolete agencies.

Older State Police badges from any state.

Old Western Lawman, Detective, and Express Agency badges.

US Airline Wings, Hat badges, and Service pins, especially pre-WW2.