Not "rosaries" if you mean the whole bead string, but eight crucifixes and  
four religious medals were excavated and reported from Mission San 
Buenaventura  (Greenwood  1968, 1975).  Text descriptions are available, but no  
illustrations. Others have been found at the cemetery of the Spanish Presidio 
in  Tucson.
 
 
In a message dated 11/4/2011 11:20:43 A.M. Pacific Standard Time,  
[log in to unmask] writes:

Nov. 4,  2011
Hi All,
I'm looking for information about rosaries from the  California Missions.  
We got 1, perhaps 2, from near the San Juan  Capistrano Mission.  I need 
pictures or illustrations.
Thanks in  advance.