Since I started collecting I have always like the Bakelite “BW” magazines. Over the years I have noticed various colors in the mag bases, assumably due to inconsistent mixes in the process of making them. Here is a picture in normal lighting and one with a bright LED flashlight, as you can tell the brown ones really stand out with the LED. I really like the brown bases, two of them are on non marked mags the other is a regular FXO. Feel free to post pictures of yours as well!