Originally Posted by leunkstar
And what if you read upside down?
Than it will be something like
H ...
1983
And the upside down Y
mmm let's think
A B C D E F G H I J K L
A? K?
wild theories...
I don't think the usual meticulous Japanese worker would stamp the date code the other way round as the word 'Shimano'. Besides that the 'Y H' is very clear, and I don't believe Shimano were still producing that early DA hub in screw-on version in 1983.
Any more guesses?