N Scale PRR P70 Clerestory Roof Grille Vent 4PK

Image by Keystone Details

This N Scale Clerestory Grille Vent sprue is specifically desinged for the Keystone Details clerestory roofs (may fit other clerestory roofs as well).  

Grille vents of this type can be seen in photos in the book "Passenger Equipment of the Pennsylvania Railroad Volume 1: Coaches" by Liljestrand and Sweetland published by The Railroad Press 2001.  View these and online photos for placement.