Green Entries
I hope that this is relevant to the discussion.
I do not know when the green entries were initiated but my father told me that when he was informed of his, it was so new that they did not believe at first that it was to be written in green ink, which it was. I quote from the logbooks which I inherited. The authority suggests to me that it was started in October 1944.
Green Endorsement
"159460 F/Lt G Fraser is commended for having flown, under the difficult conditions peculiar to South East Asia, 1,000 hours on Single Engine aircraft without an avoidable accident."
authority AMO A 10/44 22.10.45