I've owned literally tons of old amps and loved many of them, but I'd say they were all noisy and often had other issues that are fairly easily fixed without losing the good parts of the sound and feel. I suppose the buyer can choose for themselves how exact vs how updated and maybe improved they want? The '57 Deluxe I had in the early '90s was just way too mushy to be of much use to me, I could not hear it at all over my drummer, never mind with bass. Fine I suppose for a nice mature drummer in a nice quiet setting, but even alone I found it a little bucket of mush tossed over my playing. Had a fresh enough Celestion V30 and recent service so it wasn't an issue of worn out parts. I'm pretty certain there's room for a wide range of minor to major updates to this circuit that might make it a useful amp to me. Charming stock but really shouldn't be viewed as a God or a holy Cow to bow before and worship. Sold it to buy a '70 Super Lead 100 which is of course the polar opposite. Contrary to recordings made with these highly regarded amps, that first metal panel 100 of '69-'70 tends to be harsh and clean up to full brutally loud volume, and even with everything on 10 it doesn't really sound like most recordings unless you either use higher output pickups or boost it with a pedal or mods. That's why they were modded more often than they were left stock: the basic circuit had lots of room for improvement. In the next couple of years Marshall gained up the metal panel 4 input 100s and these clean Marshalls lack of dirt was forgotten or "fixed" by a tech. I've never played an original 18w Marshall but I have one clone that's stock but without trem, and two clones that are the popular TMB mod with an extra gain stage and three band eq instead of just vol and tone. The difference between the two is basically the original is good for not a whole lot while the TMB is versatile and great for almost any sounds you might need. I think we overlook the fact that so many "great vintage amps" were invariably modded or boosted on the great classic tracks we associate them with. Not all but an awful lot. If a great vintage distortion amp needs an OD pedal to give up the goods, is the amp really great stock? I had an early Park (Marshall) 45/50 with the bigger 50w transformers but still fitted with the tube rectifier. Total Holy Grail amp with hand bent aluminum chassis, impedance selector and voltage selector on the transformer bells, odd huge pots that must have been mil surplus, plexi panel of course and well over 500v on the plates. I was using it with a '72 4x12 loaded with original pulsonic cone G12M25s. After struggling for a few years with the harsh loud clang it produced (with an Esquire) I finally offered it to a vintage dealer who tested it with a TS pushing it. I was then still anti SS dirt with my "awesome vintage toob amps", and was a little surprised he used diodes for his Marshall dirt. Sounded great though, just not a sound the amp alone was capable of. I had and gigged Fender Tweed Bassman RI's too, pretty much the same issue with loud bright clean sound until cranked too loud for a bar. I found it fine to use clean in a bar, but it was really limited in practical use as an amp known for sweet breakup. I think some of the vintage amps that get dirty at lower volume actually have half blown speakers, worn out tubes, drifted components, bad filter caps, and unknown circuit changes added by techs over the years. I suppose you could argue that it's wrong to call a modded circuit a clone of the original circuit, but are a lot of builders really saying that? How might builders better refer to tweaked vintage circuits? A clone with mods is at least honest, you're not being lied too. Should they claim they sell their own designs? How much tweaking before a 5e3 is a different amp? That question does come up so it's nothing new to ask. There was a "builder" selling on Reverb and a member here bought his hand wired 5e3 clone only to open it up and find a Chinese piece of crap for his $700 or whatever the price was. Totally stock though AFAIK!