So armed with this insight I disappeared down another internet rabbit hole.
Seems that in the US these Japanese frames from this era are held in high esteem.
Late 70's to mid 80's before the yen crashed and production was moved to Taiwan The first generation frames were not strong enough or proportioned properly for the taller and heavier westerners, but once the makers took this on board they started banging out very good quality stuff.
They were certainly exported to the US, UK and Holland.
On one thread regarding serial numbers it was suggested that the second letter in the serial number referred to the month of production rather than the fortnight A - M but missing out the letter i.
This would make mine December 1979.
Seems that in the US these Japanese frames from this era are held in high esteem.
Late 70's to mid 80's before the yen crashed and production was moved to Taiwan The first generation frames were not strong enough or proportioned properly for the taller and heavier westerners, but once the makers took this on board they started banging out very good quality stuff.
They were certainly exported to the US, UK and Holland.
On one thread regarding serial numbers it was suggested that the second letter in the serial number referred to the month of production rather than the fortnight A - M but missing out the letter i.
This would make mine December 1979.