I have a Taiwan made FG-340 ii
serial on neck block 3112242
i purchased used in 1995, was told it was likely a 70’s vintage, but seller did no know for sure.
I would love to know the made on date. The Yamaha serial number guide doesn’t seem to acknowledge the existence of a 7 digit serial number.
Many folks with more experience than me have commented on how big and beautifully resonant it sounds. Compares well alongside much more expensive guitars.
Cheers.