How were sill plates attached to concrete foundations in older (60 years
in this case) construction?

I'm just tearing into a 12' rotted-out section of exterior wall in the
workshop and the sill plate is completely shot - but I'm not seeing any
signs of how the plate's anchored to the concrete; no J-bolts or wedges.
I'm not seeing evidence of wire ties either, although I suppose they
might have disintegrated.

Maybe it'll become obvious once I tear the rotted plate out (and
hopefully the answer isn't "nothing" ;-) but I probably won't get to that
until later today once I've got the structure well supported. I'll put
wedges in when I shoe-horn a new plate in...

cheers

Jules