What revolver is this?

[TruthTellers]

In the 1989 film "Batman", Joker shoots Bruce Wayne with what looks like a top hinge single action revolver.

My guess is that it's a S&W Model 1, but the cylinder looks way too long to be the Model 1.

Any guesses?

Also, here's a link to the scene: https://www.youtube.com/watch?v=9OufCgFZCyU

 

[Hawg]

It's a model 1

 

[DaleA]

Well, according to this site Hawg is correct.
http://www.imfdb.org/wiki/Batman_(1989)