Drawings
First off the reproduction housings were reverse engineered from an original and many pictures of installed originals. The picture shown earlier came from this forum but was lost or removed.
The Jensen drawings show the 69024 on them. They do not show other number like the H6 or the pictured one.
Now I've seen several late cars believed to be original and they had the additional numbers.
Just a couple weeks ago I saw another one owner car that only had a 69024 , 6 th. from the end of MK1A production it didn't have the fill to tab in the header tank or overflow tank . It's my conclusion that they put on what they had and the pictured one may be what its OP said it was reported to be, and original chromed LAT lid. In all fairness I can't see them stamping a freshly chromed lid. Arguably anything other than a flash chromed lid will get those numbers filled up with copper nickel and final chrome plating.
Somewhere I've seen a picture of corralled crates of motors with no cleaners installed and also the picture of the industrial engine tag