Pennsylvania Railroad Position Light Lens (PRR)
Description
This is a light lens, or roundel used primarily by the Pennsylvania Railroad in their position light signals and Norfolk Western used these lenses until 1959 when they started upgrading their lenses to color lenses, aptly name Color Position Lights. This lens was a fog penetrating lens with a frosted tip. Along with a phankill and angled inner lens and a mirrors that the bulb actually was pointed towards the rear of the light hitting the mirror helping with diffusing light thus helping in foggy conditions and oncoming headlights of locomotives. This is true to scale so it may actually fit inside an actual light box, but I haven't tried yet. Try printing in a translucent yellow! I included two files. One with the bottom removed so light can actually reach inside the cone an illuminate, but slicer software doesn't like open face hole, or surface borders. I also included a closed proper version which may or may not hinder the translucency of the lens once printed.
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