Originally posted by pathdoc ...the LX was restricted in the speeds it could handle without the batteries in. Vague memory of reading something about all the speeds above flash sync being available.
This is correct. Without power the LX can shoot from 1/75 and upward.
The MX was the last camera design with full mechanical speed range.
The K1000 was the last available/produced as TwoUptons mentioned.
Any of the "push-button" shutter speed style cameras are limited to their flash-sync speed.
Beyond those, without battery power they're paperweights.