Your model number is 6102, the J05502 is the serial number.

That model number checks out as a 1971 Evinrude Fisherman. I see they have the 'Dark Blue', '69-71 here:
Antique outboard Paint 
You might want to check with the owner of the site to make sure that's correct.


As for decals, I'm not really sure where you can get them. There's some '79 6hp evinrude ones on ebay right now, as well as some more generic Evinrude ones.