Thanks Aegon. The
SV is actually not
that old
-- it does not have a separate slow-speed dial like the original Asahiflex, the S, the K, etc. I did try turning the (only) shutter speed dial, as if it were behaving like a T (Time) exposure. But if I've had it on 'B', then clicked and held (or released, for that matter) the shutter button, the shutter speed dial will not turn unless and until I first wind on. After winding on, then I
must turn it to some other (finite, not B or T) speed, and fire, to get the shutter to close. Odd, eh?
--Dave