Roland JC-60 - help please

[DB Cooper]

Hey all ~ Just picked up a nice-condition Roland JC-60 amp. I'm trying to determine the year of production, but so far have only found the instruction manual on the Roland site.

Model is JC60
SN is 756917

It appears to be an older amp; seller thought 1970s but was not positive either. Regardless, it sounds sweet and clean. But I'd like to know when it was made - any help would be appreciated!

~DB

[joecool85]

Pictures would help if you can provide them.  Short of them I'm inclined to believe that mid 1970s sounds right.