Here is a closer look, for those that are not familiar with this speaker, it is a three way sporting a 12" paper Woofer in a sealed box of solid construction. The Midrange and Tweeter are Beryllium Copper domes and were state of the art at the time of manufacture. The large White Yamaha Logo is missing from the space to the right of the tweeter (both speakers), there is no sign of it ever being applied. I think it was screen printed directly on to the cabinet as it doesn't look like a  sticker or transfer on other examples I have looked at. No sign of it and the black wood grain finish looks perfect with no sign of over painting etc, it's a mystery. I think the logo was a bit large and did nothing for the looks so I am not that bothered at the moment.