Ways to unfreeze a stuck lens cell in a very old shutter?

[Stephen Thomason]

Great idea on the hose clamp!

[Patrick13]

Many great ideas.

The one that worked was 1) freeze the whole contraption and 2) rubber band and big wrench. It spun dryly, but without tons of force.
Thanks, all.

[j.e.simmons]

Press the lens into the sidewall of your car's tire and twist the shutter. Works very well.