Saddle Years Question

[snyderz]

Can someone tell me what years Fender used the saddle barrels that look like a cut-off threaded bolt vs the smooth barrel with slot.
Thanks

[Turnaround]

Starting in late 1957 Fender started using the threaded saddles, at the same time that they introduced the four saddle bridge rather than the two saddle type. They switched to barrel saddles with a single groove in 1969. Vintage reissues starting in 1982 were fitted with the threaded types again.

[snyderz]

Thanks Turnaround. Exactly the info I needed.