This jar was made in a mold that used to read "L & W" for Lorenz and Wightman.  When Lorenz left, his initial was peened out of the mold but you can still read it (although not int this photo).  This was not uncommon at all in jars and many jars have peened out embossing.

I think there is one or two others of this jar, but it's pretty rare.

The neck of this jar is a little bit different than many wax sealers - a bit of a bullet shape.  Wax sealers can often be recognized by the shape of the jar.  In some the neck is long, some it's short.   Some are more angular, some more tapered.

The color is also a little distinct with a bit of a gunpowder blue in it.  More of a sapphire blue than a cobalt.