Difference between Copal 0 model 44 and model 45?

[karenhauser]

Hello,
merge fruit
What is the difference between Copal 0 model 44 and model 45? Both happen to be from Fuji lenses although this may or may not matter.

[Oren Grad]

Those aren't shutter model numbers - they're catalog numbers for the aperture scales fitted to the shutters.