I apologise I had used the terminology MR2/AEW2 as per the data on the Growler and UK serials.

https://www.thegrowler.org.uk/avroshackleton/mark-two.htm

From this I assume earliest would be WL739 and latest WL787 – assumes the fabricator of the door made several at a time rather than one individually for each aircraft when needed (?) e.g. WL738 first flew 12 days after the first data plate was stamped.

I also assume that the second data plate refers to the HSA Langar Phase 3 modifications so  we can delete some of these as the conversion was outside of the second data plate timeline. Also some were SOC before 66.

I will fabricate a new safety equipment panel for the door and repaint in  (Extra) Dark Sea Grey

P.S. pics of data plates for info