Hitachi / Renesas H8/300 date code question

[peter-h]

Would anyone know what date code is OL1?



There is nothing else on the actual chips either.

I believe it is around 2010, plus or minus a few years. That was when I bought them. The packaging changed around 2013 to show the more conventional format e.g. 1422 being 22nd week of 2014.

I have a lot of these; some OM1 etc.

Thank you in advance.