Favorite Vintage Medicine Jar

This is a small jar, a wee bit smaller than a baby food jar. It measures 2.5" x just under 2". The front says Antrol, and under that it says Reg.U.S.Pat. Office and under that is Antrol Laboratories Inc. On the back it has a line and it says fill to line and under that it says Los Angeles, Calif. The bottom says Patented and in the middle it has an 8 and under that it has what looks like an L with an 8 in it. The jar is textured. The top is very interesting and the reason why I like this jar so much. The cap is a screw cap and the seams do not go over the rim. The top of the jar has three dips in it and I am not really sure what they are used for, but they make this an extremely neat looking little jar. Hoping you friendly neighborhood bottle experts can help me with this one. Don't know anything about it. Thank you for stopping by.