It's hard for my eyes to tell from the photos and lighting, but it's most likely e-nickel. If you look at it in natural light, e-nickel tends to have a slight golden hue to it...hard crome is more silver.
Yours is the same configuration as my Dick Special in e-nickel...with standard walnut stocks.
Yours is the same configuration as my Dick Special in e-nickel...with standard walnut stocks.