Off the top of my head, these are some of the TM 300 forged models that are forged by Miura:
Tour Issued:
TM 300 Lehman Grind
TM 300 Lehman Grind TL2MM
TM 300 NS Grind
TM 300 2MM
TM 300 +2MM
The Lehman grind does not have a stamp, but a chararteristic square toe.
You can find TL2MM, NS, 2MM and +2MM sets both with and without stamps.
There is also an early Japan retail set of the TM 300 that is forged by Miura. The retail version of the TM 300 forged is from what I understand forged in Mexico.
Tore