i hope you dont mind me resurecting this post as my first on this forum.
I would just like to say that i agree totally with Liam re his comments and info on the Denison from my own research and from what i have seen.
I have however seen a 1948 smock, it looked just like the 2nd pattern but with chromed snaps.
I have only 4 original smocks, 3 of them pictured here. The first on the left is dated 1945 and minus the tail flap, 2nd from left, also 1945 the 3rd being a 3rd pattern dated 1952 in almost mint condition, made by G Davis & Co. The 4th is a 2nd pattern repro made from WW2 sleeping bag material.
Liam, i actually sold you a manky 59 pattern many years ago on feebay, one of your first transactions on that auction site. It was i belive a suez or desert type colour i seem to remember.