Well first of all, you need to understand that just because you haven't seen something, doesn't mean it doesn't exist. Personally, I have never seen the Leaning Tower of Pisa, but I know it exists.
There are many, many drug manufacturers for both generic and name brand drugs. There are companies manufacturing in both the US and abroad, and all of their pills look different. So one drug, such as Darvon, could have 50 different markings and descriptions, or sometimes more.
Westward 235
[u]is</u> a generic Darvon,
Propoxyphene 65mgs.
Here's an image page, scroll to the bottom and you will see your pill, with a clear ID next to it.
http://www.wallsrx.com/services/cpid...0&photo=%0D%0A verwon@gmail.com
My information is not guaranteed correct. I do not get them right all the time, but I do enjoy the hunt~