Brandon:
Welcome to ECN! Jump in anytime with comments.
This is an interesting bulb! There was (may still be) a shop in New York City that was only a 'specialty' bulb store; they may have had something similar to this.
As to an intended use.....decorative would be my first guess, possibly in a keyless; or perhaps for a border. Is the wattage, or any info on the base by the screwshell?
