Here is a view of the "can" type from #6
The right view is 18 with the "can" style taken in 1962. On the left is 14's dome with it's original whistle on top along with what I think is a different "can" type whistle. Though it is really tough to see the details, the mouths where the steam comes out look different to me. 14's has a longer stem on top. This leads me to believe they are different whistles, and thus probably loaned to the engines for short times. In both cases there aren't as many pictures with these particular types in place.
The right view is 18 with the "can" style taken in 1962. On the left is 14's dome with it's original whistle on top along with what I think is a different "can" type whistle. Though it is really tough to see the details, the mouths where the steam comes out look different to me. 14's has a longer stem on top. This leads me to believe they are different whistles, and thus probably loaned to the engines for short times. In both cases there aren't as many pictures with these particular types in place.