Golden age of vinyl recordings?


I know that for a period of time recording studios used analog equipment to make records. Eventually this switched to solid state. What period of time were the best vinyl recordings made? It doesn't matter what genre of music. I just want to know what to look for. I currently listen to classic rock and blues but am open to expanding my horizons (i.e. classical or jazz). Thanks.
jsonic
68-71 is a very short time period, what was happening in London then ? This is interesting.
It is always "who" but that is always connected to when and where.
"Primitive studios" are good, I want that minimally processed "live in the studio" sound. 

@inna- Chris Blackwell’s Island Records, an independent label at that time, was eating every other label’s lunch- he had signed Stevie Winwood and Traffic, went on with Jethro Tull, Fairport Convention, the band Free, King Crimson, Nick Drake, John Martyn and a long list of other notable performers. Other imprints were formed to compete for the ’youth market’-- Deram (Decca), Vertigo Swirl (Philips), Charisma and Harvest (EMI) among others. They signed, recorded and released bands like Pink Floyd, a host of progressive bands that grew out of the Canterbury Scene, Sabbath and the later records of Roy Harper. Atlantic, which really didn’t have much of a presence there, grew from its signing of Zep. That label also had YES and a number of other prog, rock and other bands.
There were lot’s of obscurities too. Comus-First Utterance is probably one of the strangest records you will ever hear-- but became a cult favorite for the newly emerging psych folk scene. I could go on, but I think that gives you some context. One of the artists told me that the main reason they were all in London was that rents were cheap; their proximity made working and playing together a pretty natural outgrowth of what was happening in post-Swinging ’60s London. And of course there were studios, equipment vendors and clubs. Joe Boyd (who represented Fairport, Nick Drake and a number of others) opened a club called the UFO that was a scene for a while. The original house band was Pink Floyd. In short, there was a lot going on, different than the NY or later LA scenes.
PS: a lot of what I really like are the obscurities that fell threw the cracks, commercially. Though Sabbath and Gentle Giant were among the best known bands signed to Vertigo, there were some pretty amazing records that came out on that label in the period 1969-73, from bands that were never radio friendly, but had killer chops. Several worth mentioning are: Gracious!, Patto and Cressida.
Current Berlin rent is quite low though rising, yet I don't hear anything happening there except techno clubs. London might still have what it used to have. Just move one hour from the city and rent can be okay, just like New York. Not that convenient but not bad. 
Obscure bands, great concerts by well-known artists recorded but never released..
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When I bought my Klipsch Heresy III speakers last year there was a "free album" offer sticker on the boxes. One per speaker...so I went to the Klipsch site and wound up with 2 10" 33rpm mono albums, one of early Monk, and a Miles Davis thing...AMAZING quality things that sound so good in all ways (even with my stereo phono cartridge) that it blew my little mind. If anybody needs to see where Jazz went, listen to people like Vijay Iyer and Craig Taborn, and many many more current geniuses...it's alive and well.