This post shows a SCA CD 133.1 Dec 19 1871 telegraph bullet that was found between 1973 and 1975 on the Chicago Northwestern Railroad as it ran East out of Boone, Iowa toward Ames, Iowa. Five SCA and seven Aqua CD 133.1's were recovered. Details are as follows:

CD-133.1 Patent / Dec 19 1871 (Front Skirt) - 3 /A (Back Skirt Mold Style Number & Letter - Light SCA (Microbubbles & Cull Stones) - Measurements: 64 mm Wide x 89 mm Height. (Light Embossing)

The next post shows the back of the SCA CD 133.1 found in Iowa [id=614294808].