Bren Mk1 markings

[alvor1]

I have a Mk 1 Lithgow A478.  Can anyone please help identify the other nos on the gun. MA 52. ( there is a matching A478 below but it is only scratched and not stamped) 11-50-FT and on  the barrel 09749   S.  and 53538.  and 11.  '53.  
Many thanks 
Ian 

[Richard Fisher]

MA 52 - Made Australia 1952. Place and date of manufacture of that part.
11-50-FT: Possiblt November, 1950, Factory Thorough (usually followed by an 'R' for refit)
11. '53: November, 1953 for that component.

Barrels were serial-numbered with a 'S' to indicate a Spare.