Kinda funny how marbles seem to migrate together.  Looks vintage to me based on the similar ones I've come across, and vintage Alley would have been my first guess.
 
	As a side note - A family member recently brought me some childhood marbles and I mentioned the 'modern' word.  Modern for a lot of people, doesn't mean 40-60 years ago,  is how the conversation went, and we joked about getting older.  I enjoyed that visit.  Good times and some marbles.