Hello, I've just acquired five very tidy .303 Bren mags & wondered if anyone could help with deciphering the various stamped markings present on them?

Four of them are close to being identical, with the following marks in evidence:

Attachment 27309Attachment 27310Attachment 27311

The fifth has a different set of stamps, as follows:

Attachment 27312Attachment 27313Attachment 27314Attachment 27315

Would I be correct in assuming that the '42' & '54' marks are dates & the 'MA' & 'FTR' are manufacturer's codes?

Also, is it possible to remove the top plate from a mag without any specialist tools, as one of mine is not seated properly?


Thanks in advance for any assistance anyone can offer,

Kevin
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