Looking for anybody else who has seen this type of button:

We have both a gilded copper alloy stamped button and a blue glass insert for a button that displays a grotesque male profile with a long beard and a laurel wreath on the back of the head.  The button has a stamped inscription that reads “Paseo Del Retiro  Ano 1772” and has a simple cast shank.  

Has anyone seen anything like this or can anyone shed light on the meaning of this phrase/likeness?  These artifacts were recovered from a shipwreck located in the mid-Atlantic region of the Eastern US.  We’re thinking something New Years related perhaps, Path to Retirement, 1772?  Anyone?

Button Image:
http://www.geocities.com/underwaterarchaeologyjobs/Posts/scan0004.tif

Jason Burns
Southeastern Archaeological Research, Inc.