M1 Barrel Identification

[Avalonthas]

I don't know much about identifying marks. All I know is this barrell is a 1953 Springfield Armory. Can anyone tell me what the other marks signify if anything:

 

[toyboy]

the stuff you blanked out is not a serial #,it's the drawing#.
the barrel was made in may 1953.
a184b is the heat lot #.
SA is Springfield armory.

 

[Avalonthas]

thanks