This one is serif embossed: Patented/Aug 26 1851 Note that this one has no punctuation marks, which is odd for Otis LRIs. It is missing its brass cap and point. The patent date is for the Otis type LRI. It is a big glass Otis. It is a little over 2 1/8" tall, and 2 1/4" across the base. For some reason this particular mold style comes in a variety of normally non-Otis colors: blackglass, gingerale, celery green, green aqua, and others. Purchased in 1990 from Jerry Turner's LRI collection.