[quote name='Conan' timestamp='1389100967' post='2329862']
Isn't it? What was he playing in the early seventies? I've seen him with T-birds and Rics, but this track sounds like a P bass to my ears...
[/quote]
Well... To my ears, this is the classic Thunderbird front pickup tone through and through. MT has a very similar tone these days (although not quite as gritty) when he plays his Thunderbird.
However, in his autobiography, MT insists he used his Rickenbacker 4001 to record Argus, even pointing out how people assume it's the thunderbird because it was pictured in the album sleeve. MT'sWA recently re-recorded Argus and he played the Rick again - I haven't heard it myself but I can't believe the original Argus is a Rick. There are plenty of Youtube clips of MT playing his Rick and it doesn't sound like Argus at all.
Now, Pilgrimage - [i]that[/i] sounds like a Rick!
The debut album was recorded before MT owned a proper bass so he played a rented Fender Jazz with flats. He didn't think much of the sound...