Re: The mighty Marshall 1962HW (Handwired Bluesbreaker Combo)
the elephant in the room for the OP is that NONE of the components in a new marshall are the same as an original bluesbreaker. The speakers are made in china, as are nearly all of the electronic components inside the amp. In addition to this, modern day tubes are either produced in china or russia and are quite different to what was freely available back in the day.
Times have changed.
Original spec. means a lot more than original branding.
You can get fantastic sounding amps these days from Marshall and many other manufacturers, but you will never get an amp that is the same in every respect as the originals. The only thing that has remained is some of the well known company names such as marshall, celestion, atom etc
Chasing the holy grail is a pursuit for blues lawyers and not working musicians.
Getting a great sound is often more about getting whatever amp you have working at its best. The classic tone we all know from the bluesbreakers album involves cranking the amp. You simply can't crank one of these amps in 99% of gigs anyway, so kiss the tone you hear on old records goodbye. No amount of internet research will replace gigging experience and ill lay down any amount on a bet that a good player with a smaller amp will get a much sweeter and "more authentic" tone than someone with a real bluesbreaker for the very reason that they can crank the smaller amp, rather than have to keep it low on the volume dial and neuter the tone.