The BladeForums.com 2024 Traditional Knife is ready to order! See this thread for details:
https://www.bladeforums.com/threads/bladeforums-2024-traditional-knife.2003187/
Price is $300 ea (shipped within CONUS). If you live outside the US, I will contact you after your order for extra shipping charges.
Order here: https://www.bladeforums.com/help/2024-traditional/ - Order as many as you like, we have plenty.
I've seen other True Temper patterns with that type of code stamped. A Jersey B41 and a Dayton A28.
After talking with my friend again, he says that he was the only one who had touched it because of the condition it was in. He sanded and polished the head. He did not stamp/restamp it.
I'm trying hard not to dampen your enthusiasm but I am also trying to expose deliberate (or even accidental) treachery. Heaven knows you might have paid $200+ for 'quick & dirty' misrepresentation. I'm forecasting that it won't be long before Kelly Black Ravens re-appear on the market, entirely without Chinese ciphers, only because they got intercepted by middlemen in transit.
If your buddy is forthright about all this he'll be able to explain the hand stamp, and the upside down 8.
And hopefully he'll have 'before and after' pictures. Most of us do. Had I got ambitious and hung a real number on a freebie or 'write-off' head for sure I would have had pictures of the whole show. Everybody, once in their lives, wants to profit from believing they could "make a silk purse from a sow's ear".
I don't know if this helps but here are two that I have with stamped numbers, both with ridges:
This is from an active listing but looks to be the same kind of beast you have there: