I think these old single-coil axes are way cool. Thanks for sharing those great pix!
The saddles on the earliest Fender Precisions were made from the same materials that the pickguards were made from. IIRC, the US government restrictions during the Korean War made it difficult to get whatever metal Leo was looking for, so he improvised. Problem is that the old phenolic saddles tend to crack, warp and finally break over time. You can get similar material now and shape your own saddles, as somebody obviously did for this bass. Fender switched to metal in 54, I think, and people would also swap out their old broken phenolic saddles with the newer metal ones.
At the request of some cats who post at another forum, I did a little experiment. I played a 53P with reproduction phenolic saddles and recorded two feeds -- one from an Avalon DI and one from a mic'd Ampeg B-100. Then, I switched the saddles to a set of metal ones like they used after 54, and recorded basically the same line.
I posted the clips here:
http://www.soundclick.com/bands/default.cfm?bandID=901072
Can you tell which is which?
(Just to be clear, Amp1 and DI1 are the same, just different points in the signal chain...same with Amp2 and DI2.)