From a Quality control perspective......and given facts...... Mass produced items made now are better quality than these amps were in the 50s and 60s....or than anything made before the 80s in America or the 90s.....this is why all 50/60 /70 stuff from this era is pretty bad and at the same time Japanese made stuff was better because of better quality control. Its just QC. Like Fender probably runs at Sigma Six or higher quality control which means their tolerences are pretty tight and there are only defects in one per million parts.....transisters, capacitors etc etc.........No such thing in the 50s and 60s and the defects per million were much much much higher. This didnt change much until Motorolla implented sigma six quality control in the 80s and everyone began adopting it. Before this in the 50s and 60s there may have been defects per 100,000 or less which is not all that good in comparison. Given this and that a circuit doesnt care how its made, who made it, where its made.....the stuff made now is miles miles better even that when it was made back then in the golden age just because our quality control is light years ahead of what it was in the 50s and 60s. Quality control now is like 1,000% better than it was back in the 50s and 60s given Sigma Six quality control or higher being used by Fender and modern manufacturers, This is a fact. Sigma Six is an industry standard now and they may be using higher quality control methods but at the least that one to keep to modern standards. Simply put if you get a Fresh 65 of the line and sent it in a time machine to the future and compare it to a 65 modern counterpart your probably not going to tell a difference and might actually walk away thinking the Modern one soundes better. Agree or not I argue given quality control you actually have a better 65 being made now than you do in the actual year of 65. They had nothing close to Sigma Six in the 50s and 60s and in comparison they would be much lower quality to modern amps PCB or not it doesnt matter given the QUALITY CONTROL we have now versus back then.