Ron,
Thanks for that. Bill and I will be wading through the info held to try and identify that for you in due course. Sadly "CLOUDY" is a great phrase and covers a lot about what happened with Parker Hale as it slid down the slippery slope.
I apologise for any misunderstanding on my post but the recorded writing is what I have to go by in the hope that the engineer on the day was not under pressure duplicating the serial numbers and the models, as don't forget the "Official" records have been destroyed and we are going by personal interest hand written entries in little black books, and at best scribbled:
C3A1 - M87
C3 - M82 (1200TX) more commonly known
to also clarify also and thank to Darren for reminding me:
C3A1 numbering: 0001C to 00500C
M86-87 numbering: 01550G to02100G
Again many of the entries miss out zero's and letters too, which occurrred in conversions at Enfield as well on the L42 so it isn't unique to PH