Well, GCD has already has this one cataloged:

Fightin' Marines #2:

I dig the coloring, but that line-work leaves much to desire...  This one was a surprise arrival/gift from a knowledgeable UK collector.  @Get Marwood & I 

Published by L. Miller & Son Ltd with likely a local UK Artist drawn cover.  No other like it!  The date of publication might be attributable to the fact that it's "L. Miller & Son" and not "L. Miller" or "L. Miller & Co."  GCD has an approximate date of 1956 for this series, and nearly all interior contents are pulled from St John's Fightin' Marines #3 (December 1951).  L. Miller only reprinted four of the original St John five stories.  What I find amusing is the copyright note of acquiring the right to reprint from Charlton.

...But but but it says "printed in the Republic of Ireland"!  I guess I shouldn't say it's a UK book?

We get a Matt Baker Canteen Kate story inside.  Decidedly not so great printing/reproduction of our favorite artists work...

I'm planning on sending off for a few of these items!!

Size is about Golden Age width, but kinda on the shorter side of height... 

Single staple book with slight rust, but overall a very clean copy and I wouldn't be at all surprised if this were to grade out at around 6.5.