Parker Hale M82 serial number range?

[Gil Boyd]

I can as the holder of what is left of the Holy Grail which is Parker Hales recorded/tests history, I can confirm P, R & indeed S feature as pre stamps for the M82 Rifle.

If you show the complete number I can check to see if they feature on the M82 lists that remain and any history. However, There is only only entry close to either of your start numbers ie S33949.