It was interesting to speak to some PPCLI vets and apparently during Korea they used type 67 scoped T's and the Lyman TP's.
No one seemed to recall the standard T with the mk 3 32 scope over there like the typical 90L.
Apparently HQ Co 2nd Battalion had a few TP's available for the use of troops who wanted to sign one out and take some ammunition "out" and do some plinking.
A fellow I know with another TP figured it is likely on its third barrel and mine is likely on at least its second. Mine has been refinished at some point and has a long butt with no idea how long the original butt was off the rifle.